9 2 ▁ ▁) ▁Le vi ▁Leonard ▁Con ant : ▁The ▁Number ▁Con cept : ▁Its ▁Origin ▁and ▁Development ; ▁New ▁York , ▁New ▁York : ▁Mac mill an ▁& ▁Co , ▁ 1 9 3 1 . ▁Project ▁G uten berg ▁E Book ▁ ▁Notes ▁ ▁Category : Pos itional ▁numer al ▁systems <0x0A> </s> ▁Las io pez us ▁s ord id us ▁is ▁a ▁species ▁of ▁be et le ▁in ▁the ▁family ▁Cer amb yc idae . ▁It ▁was ▁described ▁by ▁Oliv ier ▁in ▁ 1 7 9 5 . ▁ ▁References ▁ ▁Category : An cy lon ot ini ▁Category : Be et les ▁described ▁in ▁ 1 7 9 5 <0x0A> </s> ▁Sir ▁Edmund ▁Beck ett - Den ison , ▁ 4 th ▁Baron et ▁( 2 8 ▁January ▁ 1 7 8 7 ▁– ▁ 2 4 ▁May ▁ 1 8 7 4 ) ▁was ▁railway ▁prom oter ▁and ▁politician . ▁ ▁Early ▁life ▁Beck ett ▁was ▁born ▁at ▁G led how ▁Hall , ▁in ▁Le eds , ▁on ▁ 2 9 ▁January ▁ 1 7 8 7 . ▁ ▁He ▁was ▁a ▁son ▁of ▁the ▁bank er ▁Sir ▁John ▁Beck ett , ▁ 1 st ▁Baron et ▁( 1 7 4 3 – 1 8 2 6 ), ▁and ▁his ▁wife , ▁Mary , ▁whose ▁father ▁was ▁Christopher ▁Wilson , ▁Bishop ▁of ▁Br istol . ▁ ▁Career ▁In ▁ 1 8 1 8 , ▁Beck ett ▁settled ▁in ▁Don c aster , ▁becoming ▁its ▁rich est ▁citiz