SD I am indeed a Sperry Messenger you are in the Chair!
http://www.nasm.si.edu/research/aero.../sperrymes.htm
DGLDG
Ref the British politics:
Lawrence Sperry used Messenger G-EBIJ to campaign for both the Conservatives and the Liberals in 1923 shortly before losing his life in it whilst enroute to Holland 13/12/1923
Here's the book ref
Gyro! : The life and times of Lawrence Sperry
• By: William W Davenport
• Publisher: New York : Scribner, ©1978.
• ISBN: 0684157934
W