This Daily Ypsilantian-Press article from February 6, 1926 reveals that in the 20s, remnants of the old northside Peckville school were still standing, near Forest and River. The city's second-oldest school, it was then being used as part of a garage by the Swaine family.
The 1856 plat map clearly shows the school on Forest near River. Other interesting details: Maple was called Mill St., and Prospect was called Cemetery St. One wonders when the last bits of the old Peckville School were razed. Also, this map shows the school abutting Forest, but the school is said to have been later turned into the Swaine malt house, which is set back some distance from Forest. Were there two iterations of the school building? Another note is that plat maps are not infallible and were drawn by non-resident plat map companies. You can certainly find errors on old Ypsilanti plat maps.
Here is a Reward of Merit given to one Florence Small(e)y in 1857 and recently published in Gleanings. At first I thought that the school illustrated on the form was the Peckville school, and thought, "that''s a pretty imposing structure for a then-semi-rural schoolhouse!" On closer examination I see that one has to fill in the school name on this form, so I speculate that it was just a standard purchased form someone ordered from a school supply-house.
Modern-day Peckville resident Janice A. has written a delightful account of her onetime neighborhood, published in the Summer 2010 Gleanings. It's worth a read to learn about this onetime northside community.