 A former Testery senior codebreaker and shift leader Jerry Roberts, recalls that, "The imperturbable, pipe-smoking Tester spoke fluent German, but did not pretend to be a codebreaker.The atmosphere in his unit was always positive and friendly, and the personnel were well selected—Tester seemed to find the right niche for everybody.Thanks to Tester's influence the work of the Testery was very well organised."