▁White ▁may ▁have ▁question ed ▁sail ors ▁and ▁based ▁some ▁of ▁his ▁description ▁on ▁earlier ▁accounts . ▁He ▁said ▁he ▁had ▁described ▁a ▁skin ▁at ▁the ▁Le ver ian ▁Museum , ▁and ▁his ▁book ▁included ▁an ▁illustr ation ▁of ▁the ▁spec imen ▁by ▁the ▁artist ▁Sarah ▁Stone . ▁It ▁is ▁uncertain ▁when ▁( and ▁how ) ▁the ▁spec imen ▁arrived ▁at ▁the ▁museum . ▁This ▁skin , ▁the ▁hol ot ype ▁spec imen ▁of ▁the ▁species , ▁was ▁purchased ▁by ▁the ▁Natural ▁History ▁Museum ▁of ▁Vienna ▁in ▁ 1 8 0 6 ▁and ▁is ▁catalog ued ▁as ▁spec imen ▁N MW ▁ 5 0 . 7 6 1 . ▁The ▁natural ist ▁John ▁L ath am ▁listed ▁the ▁bird ▁as ▁Gall in ula ▁al ba ▁in ▁a ▁later ▁ 1 7 9 0 ▁work , ▁and ▁wrote ▁that ▁it ▁may ▁have ▁been ▁a ▁variety ▁of ▁pur ple ▁sw am phen ▁( or ▁" g all in ule "). ▁ ▁One ▁other ▁Lord ▁How e ▁sw am phen ▁spec imen ▁is ▁in ▁Liverpool ' s ▁World ▁Museum , ▁where ▁it ▁is ▁catalog ued ▁as ▁spec imen ▁W ML ▁D 3 2 1 3 . ▁Ob tain ed ▁by ▁the ▁natural ist ▁Sir ▁Joseph ▁B anks , ▁it ▁later ▁entered ▁the ▁collection ▁of ▁the ▁trav eller ▁William ▁Bul lock ▁and ▁was ▁purchased ▁by ▁Lord ▁Stanley ; ▁Stanley ' s ▁son ▁don ated ▁it ▁to ▁Liverpool ' s ▁public ▁museum s ▁in ▁ 1 8 5 0 . ▁Although ▁White ▁said ▁that ▁the ▁first ▁spec imen