Photos above and below courtesy of Susan Tunick and Michael Padwee. The inscription reads:
1st line: possibly "Made by"
2nd line: "the A E Tile Co"
3rd line: "__ E 4_ St"
4th line: "New York"
A 1912 American Encaustic Tiling Co. catalog places the offices of the company at 16 East 41st Street, Manhattan.
Architectural drawings showing tile panels