We live in amazing times! Recalling a story about Lincoln’s attempt to square the circle, I performed a web search, found a blog post w/ a quote from a book recounting the tale,¹ realized I had the book, searched the text of that book online to find the page with the quote,² consulted the endnotes in my physical copy to find the source, made another search, & found the entirety of the source text online.³

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¹ https://divisbyzero.com/2011/02/18/lincoln-and-squaring-the-circle/
² https://books.google.com/books?id=ONhhui9SRsMC&q=During+his+nights+and+weekends+on+the+circuit%2C+in+the+absence+of+domestic+interruptions%2C#v=snippet&q=During%20his%20nights%20and%20weekends%20on%20the%20circuit%2C%20in%20the%20absence%20of%20domestic%20interruptions%2C&f=false p152
³ https://digitalcommons.unl.edu/unpresssamples/413/ p240