Proof.

Two small London boys were gazing at the shop windows decorated for Christmas. Presently they came to a butcher's shop, and one of them pointed to a number of hams hanging from a large holly branch. “Look, Tom,” he said. “Look at them ‘ams a-growing up there.”

“Get away,” said the other. “'Ams don't grow.”

“Well, that's all you know about it, “said the first scornfully. “Ain't you ever ‘card of a 'am-bush?”

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