[Letter and first flight air mail cover addressed to William E. Boeing from J. S. Patterson, March 3, 1919]

Letter and first flight air mail cover addressed to William E. Boeing from J. S. Patterson, March 3, 1919. Expresses pleasure about seeing WEB during this historical trip and sends thanks for "arranging for Patsy to take such a wonderful flight." One handwritten page on Hotel Vancouver (Vancouver, B.C.) stationery and envelope.

Stamped on envelope: "Via Airplane Mail, First Flight, Vancouver, B.C. to Seattle."