▁ 1 8 0 2 ▁a ▁steam - dri ven ▁bucket ▁d red ger ▁was ▁brought ▁into ▁service ▁at ▁W ool wich ▁( p rior ▁to ▁this , ▁conv ict s ▁had ▁been ▁used ▁to ▁d red ge ▁the ▁qu ays ide ▁by ▁hand ) ▁but ▁still ▁the ▁sil ting ▁pers isted ; ▁never theless , ▁the ▁yard ▁continued ▁to ▁be ▁developed : ▁in ▁ 1 8 1 4 ▁a ▁large ▁sm ith ery ▁or ▁metal - working ▁factory ▁was ▁added ▁to ▁produce ▁anch ors ▁and ▁other ▁iron ▁items . ▁In ▁the ▁ 1 8 2 0 s ▁two ▁new ▁covered ▁sli ps ▁were ▁added ▁( No . 1 ▁and ▁No . 2 ▁S li ps ) ▁large ▁enough ▁to ▁accommod ate ▁the ▁latest ▁ship ▁designs . ▁The ▁following ▁de cade ▁a ▁substantial ▁part ▁of ▁the ▁river ▁wall ▁was ▁re built ▁in ▁brick ▁and ▁the ▁two ▁dry ▁do cks ▁were ▁re construct ed ▁in ▁gran ite ▁in ▁the ▁ 1 8 3 0 s - 4 0 s . ▁Al ong side ▁the ▁do cks ▁a ▁steam - power ed ▁saw - mill ▁was ▁provided , ▁a ▁new ▁work shop ▁with ▁steam ▁h amm ers ▁and ▁a ▁hyd ra ul ic ▁chain ▁and ▁cable ▁testing ▁facility . ▁ ▁The ▁Ste am ▁Factory ▁and ▁last ▁years ▁of ▁the ▁D ock yard ▁ ▁From ▁ 1 8 3 1 , ▁W ool wich ▁found ▁a ▁new ▁le ase ▁of ▁life ▁as ▁a ▁special ist ▁yard ▁for ▁marine ▁steam ▁engineering ▁( a ▁relatively ▁new ▁technology ▁which