▁C ess na ▁Sk ym aster ▁ 3 3 7 ▁and ▁employed ▁a ▁pilot , ▁allowing ▁for ▁a ▁system atic ▁and ▁extensive ▁programme ▁of ▁aer ial ▁arch ae ology . ▁This ▁aircraft ▁remained ▁in ▁use ▁for ▁forty ▁years . ▁ ▁N umer ous ▁new ▁and ▁important ▁sites ▁were ▁discovered ▁as ▁a ▁result ▁of ▁these ▁surve ys ▁including ▁M uck ing , ▁which ▁was ▁photograph ed ▁on ▁ 1 6 ▁June ▁ 1 9 5 9 . ▁This ▁discovery ▁resulted ▁in ▁a ▁major ▁exc av ation ▁last ing ▁ 1 3 ▁years . ▁His ▁interest ▁in ▁Roman ▁Britain ▁continued , ▁and ▁the ▁aer ial ▁survey ▁work ▁discovered ▁more ▁than ▁ 2 0 0 ▁previously ▁unknown ▁Roman ▁for ts . ▁ ▁Some ▁of ▁the ▁results ▁of ▁these ▁phot ographic ▁surve ys ▁were ▁published ▁in ▁a ▁series ▁of ▁books , ▁the ▁first ▁of ▁which ▁- ▁Mon astic ▁sites ▁from ▁the ▁air ▁- ▁included ▁text ▁annot ating ▁the ▁photos ▁from ▁David ▁Know les , ▁Professor ▁of ▁Med ieval ▁History , ▁who ▁had ▁been ▁an ▁influ ential ▁supp orter ▁of ▁St ▁Joseph ' s ▁appointment . ▁The ▁collection ▁is ▁now ▁hous ed ▁in ▁the ▁Cambridge ▁University ▁Unit ▁for ▁ ▁Land s cape ▁Mod elling ▁which ▁is ▁the ▁new ▁name ▁for ▁the ▁Aer ial ▁Phot ography ▁unit . ▁ ▁Academ ic ▁career ▁St ▁Joseph ▁was ▁appointed ▁as ▁a ▁lect urer ▁in ▁Natural ▁Sciences ▁at ▁Sel w yn ▁College , ▁Cambridge , ▁in ▁ 1 9 3 9 ▁and ▁held ▁this ▁post ▁until ▁ 1 9 6 2 . ▁He