For has it not been known that many a man driven to the verge of madness by the everlasting sight of flying fish, and the as enduring sound of the soft plop of the little bull-board sandbag, has become engaged to "a perfectly im-Poss-ible person in the second class, you know," so as to break the deadly monotony of his surroundings.
"Desert Love"
Joan Conquest
Leave it on until the last Poss....
"The Galaxy Primes"
Edward Elmer Smith
Hissing sounds, concurrence of, in forming the Poss.
"The Grammar of English Grammars"
Goold Brown