Canada reply Post Cards, to be used in correspondence with the United Kingdom, will also be supplied at an early date, and when Post Cards of this description originating in the United Kingdom and bearing the impressed postage stamp thereof on both halves, have been received here by mail, the reply half may be re-posted in Canada, for return _to an address in the United Kingdom_, as a prepaid Post Card, and may be forwarded to destination without requiring the addition of any Canada postage stamp or other postage prepayment in Canada. JOHN CARLING, _Postmaster General._ Judging by the date of the circular the reply card was probably issued the middle of December, 1882, although it was not reported in the stamp journals until the next February. The stock used was the same as that for the single cards and cut so as to be the same size as the latter when folded. The design was the same as the single cards but printed in a gray black on the first and third faces of the folded card. The reply half is only distinguished by the word "(REPLY.)" placed between the banderole and the line of instructions. Considerable interest was aroused among philatelists in 1891-2 by a controversy that sprung up over a reported "error" in this reply card, which occurred with the stamp at the left side and the inscriptions to the right. Curiously enough, this card had been chronicled as a new issue in the _Philatelic Monthly_ for March, 1885, where we read:--"We are indebted to Mr. De Wolf for the first specimen of a new double 1 cent card we have seen. It is slightly smaller than those first issued and the stamp is placed on the left side instead of the right." The fact of its existence had apparently lain dormant, except among post card specialists, until the Canadian correspondent of _Mekeel's Weekly Stamp News_ rose to remark[229] that they could be produced by manipulating an uncut sheet of the regular cards. This called forth a rejoinder from Mr. A. Lohmeyer[230] who wrote:-- In the first place, the _Error Cards_, for such they are, do not exist among the 1 cent cards, but only among the 1-1 cent of 1882, or reply-paid cards. Of this issue a comparatively small quantity were printed with the stamp in the upper left corner, and the _error_ was not discovered until after a number of post-offices had been supplied with them, whereupon they were recalled, withdrawn from circulation and destroyed. This accounts for the great scarcity of these error cards, which have, in reality, been in circulation, for I have several used specimens (halves) in my collection.