1920-30s...Messages delivered to non-stop trains

From: "Kenneth Owen" kj_owen@sbcglobal.net

During the late 1930's, Railroads would deliver Messages to Non-Stop trains, as they passed through small towns.

The Station-Master would stand close to the non-stop train, as it came running past. He would hold a wooden "Y" shaped apparatus. He held it by the bottom end of the "Y". He would tie a paper-written message onto a string; press the string into slits on the top of the "Y"; with the looped (tied) string hanging toward the bottom of the "V". A man on the moving train would stick out his arm; run it through the string loop, and thus retrieve the string with the message attached.

Please, what was the "Y" delivery apparatus called?

—Kenneth Owen, Amarillo, Tx