JP Martin – Uncle, 1964, and Uncle Cleans Up, 1965.
These didn’t survive re-reading for me. A few good lines though:
“Gratification,” he said, “is a poor word to express my feelings at this moment. I am afloat on a sea of foaming joy and delight! For the time being, I will say little, but on many a long winter evening I shall expound to you with suitable words my feelings at this extraordinary event!”
“And I shall love to hear you,” said the Old Monkey simply.