▁of ▁the ▁two , ▁although ▁as ▁separate ▁perform ers , ▁took ▁place ▁in ▁the ▁silent ▁film ▁The ▁L ucky ▁Dog ▁in ▁ 1 9 2 1 . ▁The ▁exact ▁date ▁the ▁film ▁was ▁produced ▁is ▁not ▁recorded ▁but ▁film ▁historian ▁Bo ▁Berg ul und ▁dated ▁it ▁between ▁September ▁ 1 9 2 0 ▁and ▁January ▁ 1 9 2 1 . ▁The ▁association ▁was ▁cas ual , ▁according ▁to ▁inter views ▁given ▁in ▁the ▁ 1 9 3 0 s , ▁and ▁both ▁of ▁them ▁had ▁forgotten ▁it ▁entirely . ▁The ▁plot ▁sees ▁La ure l ' s ▁character ▁be fri ended ▁by ▁a ▁st ray ▁dog ▁which , ▁after ▁some ▁luck y ▁esc apes , ▁saves ▁him ▁from ▁being ▁blow n ▁up ▁by ▁dynam ite . ▁Hard y ' s ▁character ▁is ▁a ▁m ug ger ▁attempting ▁to ▁rob ▁La ure l . ▁Several ▁years ▁later ▁both ▁com ed ians ▁separately ▁signed ▁with ▁the ▁Hal ▁Ro ach ▁film ▁studio ▁and ▁next ▁appeared ▁in ▁the ▁ 1 9 2 6 ▁film ▁ 4 5 ▁Min utes ▁From ▁Hollywood . ▁ ▁Hal ▁Ro ach ▁was ▁considered ▁to ▁be ▁the ▁most ▁important ▁person ▁in ▁the ▁development ▁of ▁their ▁film ▁care ers . ▁He ▁brought ▁the ▁team ▁together ▁and ▁they ▁worked ▁for ▁Hal ▁Ro ach ▁Studios ▁for ▁over ▁ 2 0 ▁years . ▁Char ley ▁Rog ers ▁worked ▁closely ▁with ▁the ▁three ▁men ▁for ▁many ▁years ▁and ▁said , ▁" It ▁could ▁not ▁have ▁happened ▁if ▁La ure l , ▁Hard y ▁and ▁Ro ach ▁had