fourpenny

I hit her such a fourpenny one that I sent her flying.

拳把打飞。

One day,he took me aside and promised me a sliver fourpenny on the first of every month if I would keep my eye open for a sailor with one leg and let him know the moment he appeared.

有他把拉到边，向保证每月初给四便士，如果能留心注意个只有条腿的水手，并且在他（水手）出现的那刻告诉他。