10     This involved flying over the targets at about 9,000 feet, so the Mosquitos were flown across the Channel at 25,000 feet and dived down from that height onto their target. This was felt to be a hazardous undertaking in the unarmed and highly vulnerable Mosquito as many Fw 190's and ME 109's were based in the target area, but the task was completed in less than two months in spite of very poor weather, and on most of the sorties several sites were covered before the pilot deemed it time to make for home. On some occasions pilots took their aircraft down to 9,000 feet and covered two or three sites and then climbed again to 25,000 feet, whilst still over France, to repeat the dive on another group of sites. Ralph Mottram and Val Riley held the record by covering 14 sites on one sortie on 15th February. Planning of these sorties had to be most carefully done in order to outwit the Hun and it is gratifying to recollect that no aircraft were lost on this task.     A new form of Night Photography had been developed at Farnborough, where a Wellington had been equipped with the necessary gear and an Army Exercise called "EAGLE" was held in February to test the efficiency of this method and to examine the results of night visual reconnaissance from the Army point of view. The Wellington was flown by Richard Bowen, and 140 took this chance of testing their own technique for which purpose they sent a Ventura and a Mosquito to Yorkshire where the exercise was held. The results, in spite of poor weather, were extremely good and the Army pressed for night photography and visual reconnaissance to be made available for the forthcoming operation.     Another successful dance was held by the officers on 25th March to say farewell to Hartford Bridge and, on April 7th, we moved to Northolt and estab- -+ Sorry, your browser does not support inline SVG.