“What ho!” I said.
“What ho!” said Motty.
“What ho! What ho!”
“What ho! What ho! What ho!”
After that it seemed rather difficult to go on with the conversation.

P. G. Wodehouse (1881–1975) Anglo-American humorist, playwright and lyricist [Pelham Grenville Wodehouse]

“Jeeves and the Unbidden Guest” (1919)
    (Source)