Question mark
The rhetorical question mark or percontation point was invented by Henry Denham in the 1580s and was used at the end of a rhetorical question; however, its use died out in the 17th century. It was later revived in modern-day society by Matt DiRoberto. It was the reverse of an ordinary question mark, so that instead of the main opening pointing back into the sentence, it opened away from it. This character can be represented using the reversed question mark (⸮) found in Unicode as U+2E2E. The percontation point is analogous to the irony mark, but those are even more rarely seen.
Quotation mark
The double quotation mark is older than the single. It derives from a marginal notation used in fifteenth-century manuscript annotations to indicate a passage of particular importance (not necessarily a quotation); the notation was placed in the outside margin of the page and was repeated alongside each line of the passage. By the middle sixteenth century, printers (notably in Basel, Switzerland) had developed a typographic form of this notation, resembling the modern double quotation mark pointing to the right. During the seventeenth century this treatment became specific to quoted material, and it grew common, especially in Britain, to print quotation marks (now in the modern opening and closing forms) at the beginning and end of the quotation as well as in the margin; the French usage (see under Specific language features below) is a remnant of this. In most other languages, including English, the marginal marks dropped out of use in the last years of the eighteenth century. The usage of a pair of marks, opening and closing, at the level of lower case letters was generalized.