▁however , ▁was ▁h ik ing ▁the ▁terrain ▁of ▁his ▁native ▁Wisconsin ▁lands , ▁and ▁obser ving ▁and ▁recording ▁nature ▁with ▁an ▁expert ▁eye . ▁ ▁Der le th ▁once ▁wrote ▁of ▁his ▁writing ▁methods , ▁" I ▁write ▁very ▁swift ly , ▁from ▁ 7 5 0 , 0 0 0 ▁to ▁a ▁million ▁words ▁year ly , ▁very ▁little ▁of ▁it ▁pul p ▁material ." ▁ ▁In ▁ 1 9 4 8 , ▁he ▁was ▁elected ▁president ▁of ▁the ▁Associ ated ▁Fant asy ▁Publish ers ▁at ▁the ▁ 6 th ▁World ▁Science ▁F iction ▁Convention ▁in ▁Toronto . ▁ ▁He ▁was ▁married ▁April ▁ 6 , ▁ 1 9 5 3 , ▁to ▁Sand ra ▁Ev ely n ▁Winter s . ▁ ▁They ▁divor ced ▁six ▁years ▁later . ▁ ▁Der le th ▁retained ▁cust ody ▁of ▁the ▁couple ' s ▁two ▁children , ▁April ▁Rose ▁and ▁Wal den ▁William . ▁April ▁earned ▁a ▁Bach elor ▁of ▁Arts ▁degree ▁in ▁English ▁from ▁the ▁University ▁of ▁Wisconsin - Mad ison ▁in ▁ 1 9 7 7 . ▁She ▁became ▁majority ▁stock holder , ▁President , ▁and ▁CE O ▁of ▁Ark ham ▁House ▁in ▁ 1 9 9 4 . ▁She ▁remained ▁in ▁that ▁capacity ▁until ▁her ▁death . ▁She ▁was ▁known ▁in ▁the ▁community ▁as ▁a ▁natural ist ▁and ▁human itar ian . ▁April ▁died ▁on ▁March ▁ 2 1 , ▁ 2 0 1 1 . ▁ ▁In ▁ 1 9 6 0 , ▁Der le th ▁began ▁editing ▁and ▁publishing