Anonymous 
Birch in the Boudoir 

An exchange of intimate letters exchanged between a handsome, lusty young gentleman of some thirty summers and a mischievously pretty beauty who had just completed her nineteenth year., recording their true amatory and disciplinary experiences of an Arabian harem and an English girl's reformatory establishment.
The letters reveal the exploits Charles, who finds employment in a country mansion for wayward girls, and the impetuous and mischievous Lizzie who makes herself privy to all the pleasures and punishments of the royal harem. Flouting all conventions of modesty and decorum, the two regale each other with tales of frolics and orgies, all the while exciting one another to paroxysms of pleasure.
"Birch in the Boudoir" is a classic Victorian erotic novel, published in 1905. It contains graphic sexual descriptions and themes.