Check out Prince William's Christmas Day appearance in this 12-year-old royal fangirl's selfie.
Invisible ink makes an appearance in the complaint as does Morse Code, which, of course, is pretty uncrackable.
And for those unfamiliar with Presbyterian politics, a very tight vote can certainly give the appearance of momentum.
late 14c., "visible state or form, figure; mere show," from Anglo-French apparaunce, Old French aparance "appearance, display, pomp" (13c.), from Latin apparentia, abstract noun from aparentem, past participle of apparere (see appear). Meaning "semblance" is recorded from early 15c.; that of "action of coming into view" is mid-15c. Phrase keep up appearances attested from 1760 (save appearances in same sense is 1711).