This 2017 episode covers Theodosia Burr Alston, Aaron Burr's incredibly smart and well educated daughter. She vanished without a trace as an adult, and her ultimate fate is still a matter of debate.

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Tracy and Holly share experiences of having their hearts monitored using EKG technology. They also talk about whether or not Albert Bierstadt had any natural talent.

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Albert Bierstadt’s story runs counter to the romanticized idea of a passionate starving artist. He was strategic in his career, selecting imagery that he knew would appeal to U.S. audiences, and monetizing his art outside of selling paintings.

Research:

• Appman, Sarah Bean. “How One Building Turned Greenwich Village Into an Artists’ Mecca.” Greenwich Village Society for Historic Preservation. August 6, 2019. https://www.villagepreservation.org/2019/08/06/how-one-building-turned-greenwich-village-into-an-artists-mecca/
• “Albert Bierstadt Dead.” Indianapolis News. Feb. 19, 1902. https://www.newspapers.com/image/37784929/?match=1&terms=Albert%20Bierstadt
• Avery, Kevin J. “Hudson River School.” The Met. Oct. 1, 2004. https://www.metmuseum.org/essays/the-hudson-river-school
• “Bierstadt Painting Surfaces After 100 Years.” Greenville News. June 7, 1990. https://www.newspapers.com/image/192068392/?match=1&terms=Albert%20Bierstadt%20Lucerne
• “Dealer Gets Bargain on Lost Art.” The News Tribune. Oct. 14, 1990. https://www.newspapers.com/image/738127494/?match=1&terms=Albert%20Bierstadt%20Lucerne
• The Editors of Encyclopaedia Britannica. "Düsseldorf school". Encyclopedia Britannica, 7 Mar. 2016, https://www.britannica.com/topic/Dusseldorf-school
• “Fine Paintings.” Boston Evening Transcript. May 26, 1857. https://www.newspapers.com/image/734940677/?match=1&terms=Albert%20Bierstadt
• Hassrick, Peter H., et al. “Albert Bierstadt: Witness to a Changing West.” University of Oklahoma Press. 2018.
• “Jan. 7, 1830, Albert Bierstadt was born.” Boston Evening Transcript. Jan. 7, 1902. https://www.newspapers.com/image/735167933/?match=1&terms=Albert%20Bierstadt
• “Look at This.” Boston Evening Transcript. Dec. 19, 1850. https://www.newspapers.com/image/735037015/?match=1&terms=Albert%20Bierstadt
• “Meet the artists of the Hudson River School and visit the places in nature that they painted and made famous.” Hudson River School Art Trail. https://www.hudsonriverschool.org/artists
• “Albert Bierstadt.” The Art Story. https://www.theartstory.org/artist/bierstadt-albert/
• “Mission.” National Academy of Design. https://nationalacademy.org/the-academy/about-us
• Quinn, Karen. “American Landscape Painting: Albert Bierstadt and the American Land.” Museum of Fine Arts Boston. February 13, 2014. https://www.youtube.com/watch?v=phAETFErwRU&t=9s
• “Roman Fish Market. Arch of Octavius.” Fine Arts Museums of San Francisco. De Young Museum. https://www.famsf.org/artworks/roman-fish-market-arch-of-octavius

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The first electrocardiograph was invented in 1895. That device looked a lot different from today’s machines, and there are some other contenders for the title of “first.”

Research:

• AlGhatrif, Majd, and Joseph Lindsay. “A brief review: history to understand fundamentals of electrocardiography.” Journal of community hospital internal medicine perspectives vol. 2,1 10.3402/jchimp.v2i1.14383. 30 Apr. 2012, doi:10.3402/jchimp.v2i1.14383
• Baldassarre, Antonio et al. “The Role of Electrocardiography in Occupational Medicine, from Einthoven's Invention to the Digital Era of Wearable Devices.” International journal of environmental research and public health vol. 17,14 4975. 10 Jul. 2020, doi:10.3390/ijerph17144975
• Browne, Sir Thomas. “Chap. IV: Of Bodies Electrical.” From Pseudodoxia Epidemica. 1672. https://penelope.uchicago.edu/pseudodoxia/pseudo24.html
• Case Western Reserve. “Cambridge Electrocardiograph, 1920.” https://artsci.case.edu/dittrick/online-exhibits/explore-the-artifacts/cambridge-electrocardiograph-1920/
• Fisch, Charles. “Centennial of the string galvanometer and the electrocardiogram.” Journal of the American College of Cardiology. Volume 36, Issue 6, 15 November 2000. https://www.sciencedirect.com/science/article/pii/S0735109700009761
• Friedman, Paul A. “The Electrocardiogram at 100 Years: History and Future.” Circulation. Volume 149, Number 6. https://doi.org/10.1161/CIRCULATIONAHA.123.065489.
• Fye, W. Bruce. “A History of the Origin, Evolution and Impact of Electrocardiography.” The American Journal of Cardiology. Vol. 73, No. 13. 5/15/1994.
• Goodrich, Joanna. “Forget Electrodes, the First EKG Machine Used Buckets of Saline Solution and Telephone Wire.” IEEE Spectrum. 1/5/2021. https://spectrum.ieee.org/forget-electrodes-the-first-ekg-machine-used-buckets-of-saline-solution-and-telephone-wire
• Howell, Joel D. “Early Perceptions of the Electrocardiogram: From Arrythmia to Infarction.” Bulletin of the History of Medicine, SPRING 1984, Vol. 58, No. 1. Via JSTOR. https://www.jstor.org/stable/44441681
• Jenkens, Dean and Dr Stephen Gerred. “A (not so) brief history of electrocardiography.” ECG Library. 2009. https://ecglibrary.com/ecghist.html
• Macfarlane PW, Kennedy J. Automated ECG Interpretation—A Brief History from High Expectations to Deepest Networks. Hearts. 2021; 2(4):433-448. https://doi.org/10.3390/hearts2040034
• Rautaharju, Pentti M. “Eyewitness to history: Landmarks in the development of computerized electrocardiography.” Journal of Electrocardiology 49 (2016) 1 – 6.
• Rivera-Ruiz, Moises et al. “Einthoven's string galvanometer: the first electrocardiograph.” Texas Heart Institute journal vol. 35,2 (2008): 174-8.
• Salam, Amar M. “The Invention of Electrocardiography Machine.” HeartViews. 2019 Nov 14;20(4):181–183. doi: 10.4103/HEARTVIEWS.HEARTVIEWS_102_19.
• Vincent, Rony. “From a laboratory to the wearables: a review on history and evolution of electrocardiogram.” Iberoamerican Journal of Medicine, vol. 4, núm. 4, pp. 248-255, 2022. https://www.redalyc.org/journal/6920/692072548011/html/

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This 2020 episode covers one of the transitional events between the Black Death and the Renaissance. Wat Tyler’s Rebellion was also known as the Uprising of 1381 or the Great Rising.

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Holly and Tracy talk about Tracy growing up in a mostly Protestant community with little exposure to Catholicism. They also talk about the Gorsuch family's ties to John Wilkes Booth.

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The Christiana Incident offers a snapshot of the U.S. when the country was sorting into states where slavery was upheld and states that had abolished it, and what racist tension looked like at border states in the mid-1850s.

Research:

• “The Christiana Affair Again.” New York Times. Sept. 20, 1851. https://timesmachine.nytimes.com/timesmachine/1851/09/20/87821677.pdf?pdf_redirect=true&ip=0
• “Christiana Resistance 1851.” Christiana Historical Society. https://www.christianahistoricalsociety.com/christiana-resistance
• “The Christiana Trials.” New York Times. Nov. 4, 1851. https://timesmachine.nytimes.com/timesmachine/1851/11/04/87823549.pdf?pdf_redirect=true&ip=0
• The Editors of Encyclopaedia Britannica. "Fugitive Slave Acts". Encyclopedia Britannica, 28 Feb. 2025, https://www.britannica.com/event/Fugitive-Slave-Acts
• “Fatal Fugitive Slave Riot.” Boston Evening Transcript. Sept. 12, 1851. https://www.newspapers.com/image/734734274/
• Forbes, David R. “A True Story of the Christiana Riot.” The Sun Printing House. Quarryville, PA. 1898. https://babel.hathitrust.org/cgi/pt?id=hvd.32044018986661&view=1up&seq=7
• “Fugitive Slave Act 1850.” Yale Law School. Lillian Goldman Law Library. https://avalon.law.yale.edu/19th_century/fugitive.asp
• “Fugitive Slave Riot in Lancaster Co., Pa.” New York Times. Sept. 18, 1851. https://timesmachine.nytimes.com/timesmachine/1851/09/18/109920970.pdf?pdf_redirect=true&ip=0
• “Christiana Riot Trial.” Encyclopedia of Greater Philadelphia. 2015. https://philadelphiaencyclopedia.org/essays/christiana-riot-trial/#national-history-day
• Parker, William. “A Freedman’s Story. The Atlantic. 1866. https://www.christianahistoricalsociety.com/_files/ugd/f64fcb_e6cde1713eb34263af1f191b3f349e21.pdf
• “Who was William Parker?” Christiana Historical Society. https://www.christianahistoricalsociety.com/william-parker

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Pope Leo XIII sought to find a way forward for the Catholic church at a time when the world was rapidly changing and the church was often at odds with those changes.

Research:

• Aubert, Roger-François-Marie. "Leo XIII". Encyclopedia Britannica, 18 May. 2025, https://www.britannica.com/biography/Leo-XIII
• “ELECTION OF POPE LEO XIII.” New York Times. Feb. 21, 1878. https://timesmachine.nytimes.com/timesmachine/1878/02/21/issue.html
• Jedin, Hubert and John Patrick Dolan. “History of the Church: The Church in the Industrial age.” Burns & Oates. 1981. https://books.google.com/books?id=h5LYAAAAMAAJ&source=gbs_navlinks_s
• Masci, David. “A look at popes and their encyclicals.” Pew Research Center. June 9, 2015. https://www.pewresearch.org/short-reads/2015/06/09/a-look-at-popes-and-their-encyclicals/
• Miller, James Martin. “The life of Pope Leo XIII : containing a full and authentic account of the illustrious pontiff's life and work.” G.H. Harr. Omaha, Nebraska. 1908. Accessed online: https://archive.org/details/lifeofleo1300milluoft/page/n5/mode/2up
• O’Reilly, Bernard. “Life of Leo XIII, from an authentic memoir furnished by his order.” Sampson Low, Marston & Co. London. 1903. https://archive.org/details/lifeofleoxiiifro0000orei/page/n9/mode/2up
• Pope Leo XIII. “AETERNI PATRIS.” 1879. https://www.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_04081879_aeterni-patris.html
• Pope Leo XIII. “INSCRUTABILI DEI CONSILIO.” 1878. https://www.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_21041878_inscrutabili-dei-consilio.html
• Pope Leo XIII. “RERUM NOVARUM.” https://www.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_15051891_rerum-novarum.html
• Pope Leo XIII. “Testem Benevolentiae Nostrae.” 1899. https://www.papalencyclicals.net/leo13/l13teste.htm
• “Religious.” Chicago Tribune. February 24, 1878. https://www.newspapers.com/image/349728621/?match=1&terms=Pope%20Leo%20XIII
• “Vatican country profile.” BBC. Nov. 17, 2023. https://www.bbc.com/news/world-europe-17994868

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