When she was ill, he was the most assiduous of nurses, and on one occasion got so into the habit of putting his fingers to his lips and saying "PSST!"
"The Love Affairs of Great Musicians, Volume 1"
Rupert Hughes
A loud, business-like bang brought, out this comment: "PSST!
"Whistler Stories"
Don C. Seitz
I looked toward Dragonfly and he was listening toward a half dozen little cedar trees in the direction of the bayou, like he was either seeing or hearing something, which he thought he was, for right that second he said, PSST, gang, quiet!
"Shenanigans at Sugar Creek"
Paul Hutchens