The 315-321 East 12th Street buildings are just east of the Elizabeth Home for Girls.

Let's see the old map.

Stuyvesant's farm extended to Tompkins Square Park.

His street, the one that bisects the East 9th and 10th Street grid between 2nd and 3rd Avenues (where St. Marks Church is) bisects East 11th and East 12th between 1st and 2nd.

Oh, I can read the map now! What a wild goose chase. All this time I thought the map read "St. Marlos," it actually reads "St. Marks."

Stuvesant street ran along the border of St. Marks Cemetery. My apartment is built over the North corner diamond of old St. Marks Cemetery...

That makes much more sense.