...That old infirm slaves should be properly cared for, &c... 
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
...Dibdin, who relatesthis anecdote), how frequently this was repeated; but it lasted tillthe old gentleman grew infirm, and incapable of continuing hisjourneys...
Edward Jesse 「Anecdotes of Dogs」
...They also carried a portion of meat to the aged and infirm who were unable to hunt for themselves, and had no young men in their family circle to hunt for them...
R.M. Ballantyne 「The Dog Crusoe and his Master」
...The day before hedied, though old and infirm, he made around on his own account and visited oneor two to whom he had certainly behavedbadly...
Major Gambier-Parry 「'Murphy'」
...He also reminded his sons, that, though so old and infirm, he had lately broken his tusk by fighting with and killing a very fierce rhinoceros...
George E. Waring 「The Squirrels and other animals」
...Souniformly successful was he and so wisely did he act as coadjutor ofRichard when he became very old and infirm, that he was elected to theabbacy on the death of Richard of London in 1295...
W.D. Sweeting 「The Cathedral Church of Peterborough」
...The convicts in this ship, on their landing, appeared to be aged and infirm, the state in which they were said to have been embarked...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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