▁older ▁mill s , ▁it ▁was ▁eight ▁store ys ▁high . ▁It ▁was ▁fitted ▁with ▁a ▁ 4 5   hp ▁steam ▁engines ▁from ▁B oul ton ▁and ▁W att . ▁All ▁three ▁mill s ▁were ▁steam - power ▁cot ton - sp in ning ▁fact ories . ▁ ▁The ▁complex ▁was ▁further ▁extended ▁with ▁the ▁addition ▁of ▁two ▁four - store y ▁blocks ▁on ▁Murray ▁Street ▁and ▁Beng al ▁Street ▁by ▁ 1 8 0 6 . ▁ ▁These ▁were ▁mainly ▁used ▁ ▁as ▁w are h ouses ▁and ▁offices . ▁ ▁An ▁entrance ▁arch way ▁in ▁the ▁Murray ▁Street ▁block ▁provided ▁the ▁only ▁access ▁to ▁a ▁central ▁cour ty ard ▁where ▁the ▁mill s ▁had ▁their ▁ent ran ces . ▁This ▁meant ▁that ▁access ▁to ▁all ▁parts ▁of ▁the ▁site ▁could ▁be ▁controlled . ▁ ▁By ▁ 1 8 0 6 , ▁the ▁Murray s ' ▁M ills ▁was ▁the ▁largest ▁mill ▁complex ▁in ▁Manchester ▁and ▁the ▁world . ▁ ▁With ▁ 8 4 , 0 0 0 ▁m ule ▁sp ind les ▁the ▁complex ▁was ▁huge ▁compared ▁to ▁others ▁at ▁the ▁time , ▁most ▁of ▁which ▁had ▁less ▁than ▁ 1 0 , 0 0 0 ▁sp ind les . ▁The ▁status ▁of ▁the ▁complex ▁was ▁reflected ▁in ▁the ▁amount ▁of ▁orn ament ation ▁on ▁the ▁Murray ▁Street ▁and ▁Beng al ▁Street ▁blocks ▁compared ▁to ▁other ▁mill s . ▁ ▁The ▁Murray ▁Street ▁block ▁had ▁a ▁symmet rical ▁arrangement ▁of ▁arch ed ▁door ways ▁and ▁windows . ▁ ▁This ▁pattern