Map showing it's location in the old Sanborn maps as Block 388, Lot 55, 42' 10-1/2" wide lot.
But in the oasis maps on-line today it shows this block and lot numbering change;
Name: Fifth Street Slope Children's Garden
Address: 626-27 E. 5th Street
Cross Streets: Avenues B & C
Neighborhood: East Village
Block: 387 Lot: 155
The building to the left, a slice of the brick facade can just about be seen is still standing today and is 621-623 East 5th, this building is shown on another plate along with the keystones removed from it.