▁led ▁him ▁to ▁ret ire ▁early ▁leading ▁to ▁loss ▁of ▁part ▁of ▁his ▁p ension . ▁He ▁then ▁worked ▁un pa id ▁in ▁the ▁British ▁Museum ▁until ▁his ▁death ▁and ▁described ▁as ▁many ▁as ▁ 2 8 0 0 ▁British ▁insect ▁species . ▁He ▁often ▁used ▁a ▁pocket ▁l ens ▁rather ▁than ▁a ▁mic ros cope ▁and ▁used ▁a ▁killing ▁bott le ▁with ▁cr ushed ▁la ure l ▁leaves ▁rather ▁than ▁pin ning ▁spec im ens ▁directly ▁as ▁was ▁the ▁practice ▁then . ▁ ▁In ▁ 1 8 3 3 , ▁he ▁was ▁a ▁founder ▁of ▁what ▁became ▁the ▁Royal ▁Ent om ological ▁Society ▁of ▁London . ▁Steph ens ▁made ▁a ▁large ▁insect ▁collection , ▁which ▁included ▁many ▁type ▁spec im ens . ▁In ▁ 1 8 2 2 ▁he ▁married ▁Sarah , ▁daughter ▁of ▁a ▁Captain ▁Roberts . ▁Their ▁children ▁died ▁young . ▁Steph ens ▁died ▁at ▁Ken ning ton ▁on ▁ 2 2 ▁December ▁ 1 8 5 2 ▁and ▁was ▁surv ived ▁by ▁his ▁wife . ▁After ▁his ▁death ▁his ▁insect ▁collection ▁was ▁purchased ▁by ▁the ▁British ▁Museum . ▁His ▁library ▁was ▁bought ▁by ▁Henry ▁Tib b ats ▁St ain ton ▁( 1 8 2 2 – 1 8 9 2 ) ▁who ▁continued ▁to ▁keep ▁Stephen ' s ▁tradition ▁of ▁keeping ▁the ▁books ▁available ▁to ▁other ▁ent om olog ists ▁on ▁Wed nes day ▁even ings . ▁St ain ton ▁also ▁published ▁a ▁catalog ue ▁of ▁these ▁books ▁Bibli othe ca ▁Steph ens iana ▁( 1 8 5 3