quo pro quid

Noun

 * 1) * 1824, August 10,, letter 350 to , published in The Works of Charles and Mary Lamb, volume 6 Letters 1821–1842, edited by E. V. Lucas:
 * I design to give up smoking; but I have not yet fixed upon the equivalent vice. I must have quid pro quo; or quo pro quid, as Tom Woodgate would correct me. My service to him.
 * 1) * 1876, February 24, unknown author, Daily Democratic Statesman, quoted by Chuck Parsons in “Pidge,” Texas Ranger, published 2013, ISBN 1-60344-974-4, page 185 in note 94 on chapter “Pidge and the Rio Grande Frontier”:
 * In Virginia they propose to tax each person who uses tobacco on the quo pro ‘quid’ principle.
 * 1) * 1961–62, Humphrey Mynors, quoted in The City of London: A Club No More, 1945–2000, by David Kynaston, published 2001, ISBN 0-7126-6735-0, part 3 “1959–70”, chapter 11 “Italian Motorways”, page 288:
 * Have they not conceded on occasion without getting any redeployment as a quo pro quid, knowing that they can always offload the cost on to the home market?
 * Have they not conceded on occasion without getting any redeployment as a quo pro quid, knowing that they can always offload the cost on to the home market?