▁and ▁fifth ▁of ▁the ▁five ▁rows ▁remain ▁empty . ▁ ▁The ▁first ▁four ▁table ts , ▁designed ▁and ▁manufact ured ▁by ▁De   M organ ▁and ▁installed ▁in ▁ 1 9 0 0 , ▁were ▁each ▁made ▁from ▁two ▁large ▁custom - made ▁t iles . ▁N ine ▁further ▁De ▁Morgan ▁table ts , ▁installed ▁in ▁ 1 9 0 2 , ▁were ▁made ▁using ▁standard ▁t iles ▁to ▁reduce ▁costs , ▁and ▁were ▁the ▁last ▁t iles ▁whose ▁installation ▁was ▁over seen ▁by ▁W att s . ▁Ele ven ▁more ▁De   M organ ▁table ts , ▁along ▁with ▁T . ▁H . ▁W ren ' s ▁mem orial ▁to ▁W att s , ▁were ▁added ▁in ▁ 1 9 0 5 , ▁comple ting ▁the ▁central ▁row ▁of ▁table ts . ▁ ▁All ▁ 2 4 ▁table ts ▁of ▁the ▁fourth ▁row , ▁designed ▁and ▁manufact ured ▁by ▁Royal ▁D oul ton , ▁were ▁added ▁as ▁a ▁single ▁batch ▁in ▁August ▁ 1 9 0 8 . ▁A ▁single ▁Royal ▁D oul ton ▁table t ▁to ▁PC ▁Alfred ▁Smith ▁was ▁added ▁in ▁June ▁ 1 9 1 9 , ▁followed ▁in ▁October ▁ 1 9 3 0 ▁by ▁similar ▁Royal ▁D oul ton ▁table ts ▁to ▁three ▁further ▁police ▁officers , ▁and ▁a ▁replacement ▁table t ▁with ▁the ▁correct ▁details ▁of ▁the ▁East ▁Ham ▁S ew age ▁Works ▁incident ▁of ▁ 1 8 9 5 . ▁A ▁single ▁table t ▁made ▁by ▁Fred ▁Pass enger ▁in ▁the ▁original ▁De   M