Rhode Island Tercentenary Issue First Day Cover
300th Anniversary of the Settlement of Rhode Island
Issued on May 4, 1936 in Providence, RI - Scott #777

Unofficial Town Cancel - Usquepaugh, RI
Unknown Cachet Maker - Planty #23

The  Usquepaugh Post Office, (Richmond Township, Washington County) was established on June 1, 1849 under Postmaster John Slocum. The Post Office was disestablished on May 15, 1939 and mail is handled by the West Kingston Post Office.

Sources:
Check List of Rhode Island Post Offices 1790-1994 - Del Beaudreau
Rhode Island Postal History: The Post Offices - Merolla, Jackson & Crowther