, ▁the ▁ere ction ▁of ▁fort ifications ▁at ▁D unk irk , ▁and ▁the ▁surve ying ▁of ▁T il bury ▁Fort . ▁In ▁August ▁ 1 6 6 5 ▁instructions ▁were ▁given ▁for ▁making ▁the ▁fort ifications ▁at ▁Port sm outh ▁according ▁to ▁the ▁plans ▁prepared ▁by ▁G om me . ▁On ▁ 1 4 ▁November ▁of ▁the ▁same ▁year ▁the ▁king ▁directed ▁him ▁to ▁give ▁his ▁assistance ▁to ▁commission ers ▁for ▁making ▁the ▁Cam ▁navig able , ▁and ▁establish ing ▁a ▁communication ▁with ▁the ▁Th ames . ▁Three ▁days ▁later ▁he ▁received ▁a ▁commission ▁to ▁build ▁a ▁new ▁cit adel ▁on ▁the ▁H oe ▁of ▁P ly mouth . ▁In ▁March ▁ 1 6 6 7 , ▁he ▁accompanied ▁the ▁Duke ▁of ▁York ▁to ▁Har wich , ▁which ▁it ▁was ▁proposed ▁to ▁ent rench ▁completely ▁all ▁round . ▁ ▁On ▁returning ▁to ▁London ▁he ▁was ▁sum mon ed ▁to ▁give ▁advice ▁for ▁fort ifying ▁the ▁Med way ▁and ▁Port sm outh , ▁as ▁well ▁as ▁Har wich . ▁After ▁the ▁ra id ▁by ▁fellow ▁Dutch man ▁Mich iel ▁de ▁R uy ter ▁in ▁ 1 6 6 7 ▁on ▁the ▁Med way , ▁De ▁G om me ▁was ▁asked ▁to ▁help ▁with ▁the ▁fort ification ▁of ▁She ern ess , ▁to ▁stop ▁a ▁ra id ▁like ▁that ▁from ▁happening ▁again . ▁In ▁ 1 6 7 3 ▁and ▁ 1 6 7 5 ▁he ▁was ▁making ▁surve ys ▁about ▁Dublin . ▁A ▁reference ▁to ▁G om me ' s ▁design ▁of ▁building