Punch, or the London Charivari, Volume 100, January 17, 1891

Well-informed Visitor . That's Dr. KOCH, making his great discovery!
Unscientific V. What did he discover?
Well-inf. V. Why, the Consumption Bacillus. He's got it in that bottle he's holding up.
Unsc. V. And what's the good of it, now he has discovered it?
Well-inf. V. Good? Why, it's the thing that causes consumption , you know!
Unsc. V. Then it's a pity he didn't leave it alone!
First Old Lady ( with Catalogue ). It says here that the note the page is handing may have come from Sir DIGHTON PROBYN, the Comptroller of the Royal Household Fancy that !
Second Old Lady . He's brought it in in his fingers. Now that 's a thing I never allow in my house. I always tell SARAH to bring all letters, and even circulars, in on a tray!
A. Sportsman . H'm—ARCHER, eh? Shouldn't have backed his mount in that race!
Gladstonian Enthusiast ( to Friend, who, with the perverse ingenuity of patrons of Wax-works, has been endeavouring to identify the Rev. JOHN WESLEY among the Cabinet in Downing Street ). Oh, never mind all that lot, BETSY; they're only the Gover'ment ! Here's dear Mr. and Mrs. GLADSTONE in this next! See, he's lookin' for something in a drawer of his side-board—ain't that natural ? And only look—a lot of people have been leaving Christmas cards on him ( a pretty and touching tribute of affection, which is eminently characteristic of a warm-hearted Public ). I wish I'd thought o' bringing one with me!
Her Friend . So do I. We might send one 'ere by post—but it'll have to be a New Year Card now!