on [at] one's deathbed
臨終の床で,死にかかって
on one's hands and knees
四つんばいになって
on one's [the] knees
ひざまずいて,懇願して
on one's own initiative
自らの責任で,自発的に
on one's return to the U.K.
英国へ戻り次第
on one's [the] third try
3度目の挑戦で
on one's [the] way back [to school]
帰り道で[登校途中で]
on page 22 hereof
この本の22ページに
on page 31
31ページに
on [under] pain of death [imprisonment]
死刑[投獄]の刑罰という条件で