▁in ▁return ▁for ▁to b acco ▁and ▁blank ets , ▁provided ▁large ▁amounts ▁of ▁both ▁isol ation ▁and ▁hard ▁labour ▁to ▁keep ▁the ▁crim inals ▁in ▁control . ▁Under ▁its ▁first ▁command ant , ▁Francis ▁All man , ▁who ▁was ▁fond ▁of ▁f logging , ▁the ▁settlement ▁became ▁a ▁hell , ▁where ▁the ▁conv ict s ▁had ▁limited ▁libert ies , ▁especially ▁in ▁regard ▁to ▁being ▁in ▁possession ▁of ▁letters ▁and ▁writing ▁papers , ▁which ▁could ▁get ▁a ▁conv ict ▁up ▁to ▁ 1 0 0 ▁l ash es . ▁ ▁The ▁pen al ▁settlement ▁last ed ▁from ▁April ▁ 1 8 2 0 ▁to ▁c . ▁ 1 5 ▁August ▁ 1 8 3 0 . ▁The ▁settlement ▁pe aked ▁with ▁ 1 5 0 0 ▁conv ict s ▁by ▁ 1 8 2 5 ▁but ▁by ▁ 1 8 2 8 ▁this ▁had ▁fallen ▁to ▁ 5 3 0 . ▁The ▁command ers ▁of ▁the ▁settlement ▁were : ▁Francis ▁All man , ▁March ▁ 1 8 2 1 – 1 8 2 4 ▁Captain ▁Rol land ▁succeeded ▁All man ▁in ▁April ▁ 1 8 2 4 ▁Lieutenant ▁Car mac , ▁ 1 8 2 4 ▁Henry ▁Gill man ▁in ▁January ▁ 1 8 2 4 – ▁Arch ib ald ▁Cl unes ▁In nes ▁ 1 8 2 6 – 1 8 2 7 ▁ ▁Because ▁of ▁the ▁lack ▁of ▁libert ies ▁of ▁the ▁settlement , ▁Governor ▁Ralph ▁Dar ling ▁quickly ▁sent ▁there ▁many ▁' spe ci als ' ▁or ▁liter ate