’Ay, ay!’ said the Jew, with a grin, which sufficiently demonstrated that he was at no loss to understand the reason.
That the honest fellow had not been feigning emotion, was abundantly demonstrated by the very red eyes with which he regarded the young gentleman, when he turned round and addressed him.
Everybody knows the story of another experimental philosopher who had a great theory about a horse being able to live without eating, and who demonstrated it so well, that he had got his own horse down to a straw a day, and would unquestionably have rendered him a very spirited and rampacious animal on nothing at all, if he had not died, four-and-twenty hours before he was to have had his first comfortable bait of air.
…HIS REPUTABLE FRIENDS About noon next day, when the Dodger and Master Bates had gone out to pursue their customary avocations, Mr. Fagin took the opportunity of reading Oliver a long lecture on the crying sin of ingratitude; of which he clearly demonstrated he had been guilty, to no ordinary extent, in wilfully absenting himself from the society of his anxious friends; and, still more, in endeavouring to escape from them after so much trouble and expense had been incurred in his…
As Mr. Bumble spoke, he made a melancholy feint of grasping his lantern with fierce determination; and plainly showed, by the alarmed expression of every feature, that he did want a little rousing, and not a little, prior to making any very warlike demonstration: unless, indeed, against paupers, or other person or persons trained down for the purpose.
There are no more uses of "demonstrate" in the book.