▁Dar win ' s ▁work ▁– ▁the ▁struggle ▁for ▁existence , ▁variation , ▁natural ▁selection ▁and ▁sexual ▁selection ▁– ▁are ▁all ▁fully ▁expressed ▁in ▁B ly th ' s ▁paper ▁of ▁ 1 8 3 5 ". ▁He ▁also ▁c ited ▁a ▁number ▁of ▁rare ▁words , ▁similar ities ▁of ▁phr asing , ▁and ▁the ▁use ▁of ▁similar ▁examples , ▁which ▁he ▁regarded ▁as ▁evidence ▁of ▁Dar win ' s ▁deb t ▁to ▁B ly th . ▁However , ▁the ▁subsequent ▁discovery ▁of ▁Dar win ' s ▁not ebook s ▁has ▁" perm itted ▁the ▁ref ut ation ▁of ▁E ise ley ' s ▁claims ". ▁E ise ley ▁argued ▁that ▁B ly th ' s ▁influence ▁on ▁Dar win ▁" begin s ▁to ▁be ▁disc ern ible ▁in ▁the ▁Dar win ▁Note - book ▁of ▁ 1 8 3 6 ▁with ▁the ▁curious ▁word ▁' inos cul ate '. ▁It ▁is ▁a ▁word ▁which ▁has ▁never ▁had ▁a ▁wide ▁circul ation , ▁and ▁which ▁is ▁not ▁to ▁be ▁found ▁in ▁Dar win ' s ▁voc ab ul ary ▁before ▁this ▁time ." ▁This ▁was ▁incorrect : ▁an ▁ 1 8 3 2 ▁letter ▁written ▁by ▁Dar win ▁commented ▁that ▁William ▁Sh arp ▁Mac le ay ▁" ne ver ▁imag ined ▁such ▁an ▁in os cul ating ▁creature ". ▁The ▁letter ▁preced ed ▁B ly th ' s ▁publication , ▁and ▁indicates ▁that ▁both ▁Dar win ▁and ▁B ly th ▁had ▁independently ▁taken ▁the ▁term ▁from ▁Mac le ay ▁whose ▁Qu in arian