But, as a rule, the full-grown hawks which come into the market are captives which have been taken on the autumnal passage by the professional hawk-catchers of Valkenswaard, in North Brabant. The sons of Adrian Möllen, formerly falconer to the famous Loo Club, still carry on this business of snaring peregrines on the great open heath, which for many centuries has been resorted to for a like purpose, and which, of course, takes its name from its renown as a place over which the migrants must often pass. Anyone who wants a wild-caught peregrine should write beforehand to one of these gentlemen, who will probably not fail to send him what he requires. They go out every year, in the months of October and November, and lie in wait daily in their cunningly-constructed huts until they have secured as many captives as have been ordered in various places. A dozen or more are annually required for England, and sometimes a few for France. The variety most in demand is the red falcon, that is to say, the female peregrine in the nestling plumage, not yet moulted. But blue falcons are also sometimes wanted, and of late years there has been some considerable demand for tiercels, both red and blue. Merlins, sparrow-hawks, and an occasional goshawk may be taken, and, still more rarely, a ger. The price for a falcon is four to five pounds, and of a tiercel from three to four. But a special apparatus is required for catching the smaller hawks, which will not usually come to the same lure as a peregrine. If the captured hawk has to be kept for any length of time in the captor's hands before being fetched or sent away, an extra charge is made for her maintenance.