▁final ▁break ▁with ▁the ▁demand ing ▁Duch ess ▁of ▁Mar l borough , ▁and ▁Castle ▁Howard ▁for ▁Charles ▁Howard , ▁later ▁the ▁ 3 rd ▁Earl ▁of ▁Carl is le . ▁In ▁July ▁ 1 7 2 1 , ▁John ▁Van b rug h ▁made ▁Haw ks mo or ▁his ▁deput y ▁as ▁Com pt roller ▁of ▁the ▁Works . ▁There ▁is ▁no ▁doubt ▁that ▁Haw ks mo or ▁brought ▁to ▁the ▁brilliant ▁amateur ▁the ▁professional ▁ground ing ▁he ▁had ▁received ▁from ▁W ren , ▁but ▁it ▁is ▁also ▁arg u able ▁that ▁W ren ' s ▁architect ural ▁development ▁was ▁from ▁the ▁persu asion ▁of ▁his ▁formal ▁pup il , ▁Haw ks mo or . ▁ ▁By ▁ 1 7 0 0 ▁ ▁Haw ks mo or ▁had ▁emer ged ▁as ▁a ▁major ▁architect ural ▁person ality , ▁and ▁in ▁the ▁next ▁ 2 0 ▁years ▁he ▁proved ▁himself ▁to ▁be ▁one ▁of ▁the ▁great ▁master s ▁of ▁the ▁English ▁Bar o que . ▁His ▁bar o que , ▁but ▁somewhat ▁classical ▁and ▁g oth ic ▁architect ural ▁form ▁was ▁derived ▁from ▁his ▁expl oration ▁of ▁Anti qu ity , ▁the ▁Renaissance , ▁the ▁English ▁Middle ▁A ges ▁and ▁contemporary ▁Italian ▁bar o que . ▁Un like ▁many ▁of ▁his ▁wealth ier ▁contempor aries , ▁Haw ks mo or ▁never ▁travel led ▁to ▁Italy ▁on ▁a ▁Grand ▁Tour , ▁where ▁he ▁might ▁have ▁been ▁influenced ▁by ▁the ▁style ▁of ▁architecture ▁there . ▁Instead ▁he ▁studied ▁eng rav ings ▁especially ▁monuments ▁of ▁ancient