▁was ▁allocated ▁Pr ison er ▁of ▁War ▁No . ▁ 4 0 6 ▁and ▁held ▁at ▁St al ag ▁Luft ▁I ▁Bar th . ▁On ▁ 1 9 ▁July ▁ 1 9 4 1 ▁he ▁was ▁promoted ▁to ▁flying ▁officer , ▁ ▁and ▁exactly ▁one ▁year ▁later ▁he ▁was ▁promoted ▁again ▁to ▁flight ▁lieutenant . ▁▁ ▁At ▁St al ag ▁Luft ▁I ▁Hum ph re ys ▁met ▁Roger ▁Bush ell ▁during ▁various ▁t unn elling ▁escape ▁attempts , ▁Bush ell ▁later ▁master mind ed ▁the ▁Great ▁Es cape . ▁Hum ph re ys , ▁Jack ▁Gr is man , ▁Les lie ▁George ▁Bull ▁and ▁several ▁other ▁prisoners ▁were ▁part ▁of ▁the ▁group ▁with ▁Bush ell ▁who ▁were ▁sent ▁to ▁St al ag ▁Luft ▁III ▁in ▁the ▁province ▁of ▁Lower ▁S iles ia ▁near ▁the ▁town ▁of ▁S agan ▁( now ▁Ż aga ń ▁in ▁Poland ). ▁ ▁' Gre at ▁Es cape ' ▁Al located ▁No . 5 4 ▁in ▁the ▁queue ▁of ▁officers ▁esc aping ▁through ▁the ▁tunnel , ▁Hum ph re ys ▁te amed ▁up ▁with ▁No . ▁ 5 5 ▁Paul ▁Ro yle ▁for ▁no ▁better ▁reason ▁than ▁" he ▁was ▁next ▁in ▁the ▁queue ". ▁He ▁was ▁one ▁of ▁the ▁ 7 6 ▁men ▁who ▁escaped ▁the ▁prison ▁camp ▁on ▁the ▁night ▁of ▁ 2 4 – 2 5 ▁March ▁ 1 9 4 4 ▁in ▁the ▁escape ▁now ▁famous ▁as ▁" the ▁Great ▁Es cape ". ▁ ▁He ▁followed ▁Den ys ▁Street ▁out ▁of ▁the ▁tunnel ▁at ▁about