I give the story as it was told me, and it was told me for a fact. A man fell from a housetop in the city of Aberdeen, and was brought into hospital with broken bones. He was asked what was his trade, and replied that he was a “tapper.” No one had ever heard of such a thing before; the officials were filled with curiosity; they besought an explanation. It appeared that when a party of slaters were engaged upon a roof, they would now and then be taken with a fancy for the public-house. Now a seamstress, for example, might slip away from her work and no one be the wiser; but if these fellows adjourned, the tapping of the mallets would cease, and thus the neighbourhood be advertised of their defection. Hence the career of the tapper. He has to do the tapping and keep up an industrious bustle on the housetop during the absence of the slaters. When he taps for only one or two the thing is child’s-play, but when he has to represent a whole troop, it is then that he earns his money in the sweat of his brow. Then must he bound from spot to spot, reduplicate, triplicate, sexduplicate his single personality, and swell and hasten his blows, until he produce a perfect illusion for the ear, and you would swear that a crowd of emulous masons were continuing merrily to roof the house. It must be a strange sight from an upper window.