▁As ▁a ▁consequence , ▁this ▁edition ▁was ▁de emed ▁in ade qu ate ▁for ▁critical ▁purposes . ▁An ▁improved ▁edition ▁was ▁published ▁in ▁ 1 8 5 9 , ▁which ▁became ▁the ▁source ▁of ▁B ult mann ' s ▁ 1 8 6 0 ▁N T . ▁ ▁In ▁ 1 8 4 3 ▁T isch endorf ▁was ▁permitted ▁to ▁make ▁a ▁fac sim ile ▁of ▁a ▁few ▁vers es , ▁in ▁ 1 8 4 4 ▁Edu ard ▁de ▁Mur alt ▁saw ▁it , ▁and ▁in ▁ 1 8 4 5 ▁S . ▁P . ▁T reg elles ▁was ▁allowed ▁to ▁observe ▁several ▁points ▁which ▁Mur alt ▁had ▁over look ed . ▁He ▁often ▁saw ▁the ▁Code x , ▁but ▁" it ▁was ▁under ▁such ▁restrictions ▁that ▁it ▁was ▁impossible ▁to ▁do ▁more ▁than ▁examine ▁particular ▁read ings ." ▁" They ▁would ▁not ▁let ▁me ▁open ▁it ▁without ▁searching ▁my ▁po ckets , ▁and ▁dep riv ing ▁me ▁of ▁pen , ▁in k , ▁and ▁paper ; ▁and ▁at ▁the ▁same ▁time ▁two ▁pre l ati ▁kept ▁me ▁in ▁constant ▁conversation ▁in ▁Latin , ▁and ▁if ▁I ▁looked ▁at ▁a ▁passage ▁too ▁long , ▁they ▁would ▁sn atch ▁the ▁book ▁out ▁of ▁my ▁hand ". ▁ ▁T reg elles ▁left ▁Rome ▁after ▁five ▁months ▁without ▁accomplish ing ▁his ▁object . ▁During ▁a ▁large ▁part ▁of ▁the ▁ 1 9 th ▁century , ▁the ▁authorities ▁of ▁the ▁V at ican ▁Library ▁ob struct ed ▁sch ol ars ▁who ▁wished ▁to ▁study ▁the ▁code