Dr. Kaufman carried photocopies of some notes and images of interest. I found the following image from collections at the New York Public Library via Wikimedia Commons that shows sites more as Stowe experienced them.
By Lane & Scott, FitzHugh Lane [Public domain], via Wikimedia Commons
The most easily identified buildings in the lithograph from the left are: First Parrish Church, Massachusetts Hall, Winthrop Hall, Maine Hall, Bowdoin Chapel, and Appleton Hall. Dr. Kaufman related the story of Harriet Beecher Stowe using her husband's office in Massachusetts Hall to write parts of Uncle Tom's Cabin.
Note a confusion in local informal history. The Bowdoin publication "Academic Spotlight" in an article "Tracing Lasting, Local Footprints of 'Uncle Tom's Cabin'" relates the story of a student tour guide who incorrectly identifies the site of Calvin Stowe's office as Appleton Hall.
As a student tour guide for Bowdoin's Office of Admissions, Tom Brickler '10 had led dozens of prospective students past Appleton Hall.
Stopping, he would say: "It was here, where Harriet Beecher Stowe sometimes worked on the novel Uncle Tom's Cabin." For full dramatic effect, he might add the words: "writing late into the stormy winter night."
The author of the Spotlight article suggests:
Though it is campus legend, no one knows for sure if Stowe—the wife of a Bowdoin professor—actually worked there during the years that she wrote the novel in Brunswick. But it hardly matters: The compulsion to imagine and re-imagine the daily existence of luminaries connected to Bowdoin—including Henry Wadsworth Longfellow, Joshua Chamberlain, and Nathaniel Hawthorne—is part of the ambience of being at such a historically significant college.
While it may "hardly matter" to casual visitors and some reporters, it clearly matters to Stowe enthusiasts and scholars. If these kinds of historical resources were more easily accessible, then perhaps we can increase the number of people who care about the historical details.