Edward Flint Thayer (1835-1887) was a son of Seth Thayer and attended high school with Adeline. The family property was on the northwest corner of Washington St. and Davis Ave. Edward Thayer was married in 1860 and was a shoe merchant in Boston living on Pinckney St. when he enlisted to fight in the Civil War.
Samuel Philbrick (1789-1859) is one the best-known figures from Brookline history. He lived at 182 Walnut St. in a house that is still standing. From the online walking tour of Pill hill:
Frederic Knapp was minister of the First Parish Church but was not married until 1855. It is most likely that this is his mother, from Walpole, New Hampshire, spending a prolonged period of time with him. Adeline had just spent the summer in Walpole and had a lot of interactions with the Knapps there.
Eveline Barney (1839-1921), age 11, is one of the two Barney daughters boarding with the Faxons.
Adeline's high school classmates: