It Itf believed, liow ever, to have been in successful op eratlon for Homo time, or since tho reorganization of tho guard service at tho border, which is said to havo stopped the caravans that formerly cumo by truck. Last nlght'aaccldent, in the opinion of tho majority of the authorities, has revealed a highly lucrativo system of bringing in contraband from Canuda. jn i no cockpii oi tno machlno was a Montreal paper of yeste'rday, show Ing the aviator had made good time. Another theory of some of tho po lice is that the booze running by aero plane was a distinctly Bporting propo Bitlon of some one of tho millionaire) colony In Westchester. Thero are many former army aviators who took a lot of chances during tho war and the little junket to Montreal, or some other point on the Canadian border, for about 150 bottles of real stuff would appear to many of tho former aviators as just a lark with a spice of danger to It. The whiskies were of various brands, which leads some persons tp think some chap with sporting blood deckled to tako a plane to Canada and fill an order for a half dozen of his friends and bring back just the particular Scotch or Irish each ono liked. Some of tho sheriffs who have had to do with seizures I, t truck stated that in theso selzn ca the Roods In nearly every case rcro of ono brand only. George J. McCall, a former Deputy Sheriff of Westchester County, has farm "about a mile and a quarter above Croton and twenty-flvo miles from White Plains. It faces the Albany Post Road. A quarter of a mile away is Tumble Inn, a much patronized roadhouse. Last night just beforo dark McCall saw a big Curtlss scout plane circling slowly over his .place, but well up in the sky.