Sense Sonnet - Pumper

355 

Known only as a numbered one.
Three five five was a lady spy,
Gave secrets to George Washington
About the British she came by.
A member of the Culper Ring
That operated namelessly,
She worked the Red Coat party swing
As Tory high society.
Benedict Arnold did regret
Falling for her feminine charm.
His treasonous intent he let
Slip to her. She hit the alarm.

Three five five had a role to play -
Lady spy for the U.S.A.