A man calling himself A.M. Waters and other names, professing to be an agent for the Gardener's Monthly, has fleeced! a number of poor gardeners by offering premiums as inducements, worth about seven dollars, for a $2 subscription. Of course, every one who reads the Monthly knows we never offer "shears" or any thing else as "premiums," and it is hardly worth taking up room by a"warning" here. We fancy the rogue aims to be something of a wag, as he proposes the gift of a pair of shears to his victims. It is strange that any one will trust $2 to a total stranger before even the shears are in hand; and only that we are told hundreds have done so, we could not believe it.