<prompt> Translate the following text to EnglishMhakiki wa vitabu wa Washington Post na mtekelezaji wa fasihi wa Exley, Yardley alisema kutumia ushahidi mdogo - kama vile simu nyingi za usiku wa manane kutoka kwa Exley kutoka 1975 hadi 1992 - kutoa hitimisho juu ya kujishughulisha na ngono ya Exley.  <response>: A Washington Post book critic and Exleys literary executor, Yardley is said to use scant evidence--such as numerous late-night phone calls from Exley from 1975 to 1992--to draw conclusions about Exleys self-absorption and ambiguous sexuality. 