ps wich , ▁Massachusetts . ▁They ▁have ▁a ▁long ▁and ▁varied ▁story . ▁ ▁They ▁were ▁first ▁built ▁as ▁two ▁brick ▁to wers , ▁ ▁apart ▁on ▁a ▁more ▁or ▁less ▁east – west ▁line ▁in ▁ 1 8 3 8 . ▁ ▁The ▁movement ▁of ▁the ▁s ands ▁led ▁to ▁sh ifting ▁of ▁the ▁to wers ▁and ▁by ▁ 1 8 8 1 ▁the ▁rear ▁tower , ▁I ps wich ▁R ear ▁Range ▁Light , ▁was ▁badly ▁crack ed . ▁ ▁It ▁was ▁replaced ▁by ▁a ▁cast - ir on ▁tower , ▁while ▁by ▁ 1 8 6 7 ▁the ▁front ▁light , ▁I ps wich ▁Front ▁Range ▁Light , ▁had ▁been ▁replaced ▁by ▁a ▁mov able ▁wood ▁structure ▁that ▁could ▁be ▁shift ed ▁as ▁the ▁channel ▁shift ed . ▁The ▁front ▁light ▁was ▁dis cont in ued ▁in ▁ 1 9 3 2 ▁and ▁the ▁rear ▁light ▁was ▁replaced ▁in ▁ 1 9 3 8 ▁with ▁a ▁ske leton ▁tower . ▁ ▁It , ▁or ▁its ▁replacement , ▁is ▁still ▁in ▁service ▁today . ▁ ▁The ▁ 1 8 8 1 ▁cast - ir on ▁rear ▁tower ▁was ▁loaded ▁on ▁a ▁bar ge ▁and ▁sh ipped ▁to ▁Ed gart own , ▁Massachusetts , ▁where ▁it ▁replaced ▁the ▁Ed gart own ▁Har bor ▁Light ▁that ▁had ▁been ▁destroyed ▁in ▁the ▁H urr icane ▁of ▁ 1 9 3 8 . ▁ ▁The ▁modern ▁light ▁tower , ▁located ▁on ▁the ▁site ▁of ▁the ▁I ps wich ▁Range ▁R ear ▁Light ▁as ▁described ▁above