Eyesses, as well as passage peregrines, may be flown at the rook; but this quarry is more suitable for a falcon than a tiercel. Mr. O'Keefe used eyess falcons for this flight, and once killed with them on the Curragh of Kildare as many as 117 in three weeks. William Barr had an eyess which, when entered to rooks, took as many as seven in nine flights. Comet, belonging to Mr. Brodrick, took many rooks. It is only rather exceptionally that a tiercel can be got to fly them. But Mr. Newcome's passage tiercel, Will o' the Wisp, took them very well. The difficulty which is generally experienced in entering falcons to rooks is much greater in their brothers' case. And the superiority of the passage hawk over the eyess is more marked in this flight than in game-hawking. Besides peregrines, several other kinds of long-winged hawks may be trained to take this quarry--gers of both sexes, lanners, and perhaps some lannerets, and the shaheen falcon, both black and red. No doubt the saker of both sexes would afford excellent sport with rooks. I am not aware that the training of any of these hawks for such a flight differs from that recommended for the peregrine. For a rook-flight very open country is required. It would be no use to attempt it in what is called a well-wooded district, or where hedge-row trees grow as they do in the far greater part of cultivated England. A single tree, or even tall bush, will ruin a whole square mile of otherwise suitable ground. Nor is it sufficient that the land should be clear of trees and buildings. Many other obstacles, such as tall, stiff hedges, wire railings, and even sheep-folds, full or empty, are detrimental to the sport. A flock of sheep, a drove of pigs, or even a herd of cattle being driven along, is quite enough to utterly spoil a good flight. Thus in all England there are but few places where you can carry on this sport with success. Amongst them are parts of the Berkshire and Wiltshire downs, and some of the South-downs, though these are usually too undulating. Parts of Norfolk, especially near Lakenheath, are good; and so are portions of the fen country, where there is not too much water. In the North of England and in several counties in Ireland there are moors and open spaces which do well.