, ▁D unn ▁took ▁up ▁the ▁role ▁of ▁first - team ▁goal keeper ▁at ▁Palace , ▁where ▁he ▁went ▁on ▁to ▁make ▁ 1 7 5 ▁appearances ▁in ▁all ▁compet itions ▁between ▁ 1 9 3 1 ▁and ▁ 1 9 3 7 . ▁ ▁D unn ▁joined ▁newly ▁formed ▁Southern ▁League ▁side ▁Col chester ▁United ▁in ▁ 1 9 3 7 . ▁He ▁played ▁in ▁Col chester ' s ▁first ▁ever ▁compet itive ▁league ▁game ▁on ▁ 2 8 ▁August ▁ 1 9 3 7 , ▁making ▁numerous ▁saves ▁despite ▁being ▁defeated ▁ 3 – 0 ▁by ▁Ye ov il ▁& ▁Pet ters ▁United ▁at ▁The ▁Hu ish . ▁In ▁his ▁first ▁appearance ▁at ▁Col chester ' s ▁home ▁ground ▁of ▁L ayer ▁Road , ▁prominent ▁bug le ▁and ▁cor net ▁player ▁D unn ▁wel com ed ▁the ▁players ▁of ▁both ▁Col chester ▁United ▁and ▁Bath ▁City ▁onto ▁the ▁pitch ▁with ▁a ▁rend ition ▁of ▁the ▁post ▁horn ▁gal op ▁on ▁ 2 ▁September ▁ 1 9 3 7 ▁for ▁Col chester ' s ▁first ▁professional ▁game ▁at ▁L ayer ▁Road . ▁D unn ' s ▁introduction ▁using ▁the ▁Post ▁Horn ▁Gal op ▁continued ▁throughout ▁the ▁club ' s ▁time ▁at ▁L ayer ▁Road , ▁until ▁ 2 0 0 8 . ▁His ▁musical ▁background ▁also ▁saw ▁him ▁as ▁a ▁member ▁of ▁the ▁Cry stal ▁Palace ▁Prize ▁Band , ▁in ▁which ▁he ▁played ▁the ▁cor net . ▁Later ▁in ▁the ▁season , ▁Cry stal ▁Palace ▁manager ▁Tom ▁B rom il ow ▁brought