Apparently from a string course above orthostates. Dressed smooth for joint with stone on under side; rough-picked on top, perhaps to carry brick. One face is smooth-dressed, the other lightly stippled ... June 1952 ... Apparently from a string course above orthostates. ... One face is smooth-dressed, the other lightly stippled and edged with a smooth band. Near one end of this face a 'lifting boss'. ... It had apparently been reused in the foundation of the propylon at the N.E. entrance of the Predecessor to the Square Building.