eleven to three
o'clock
`` Then I must name some conditions , to which I shall demand the strictest compliance on your part . '' `` Name them . '' `` In the first place , then , to avoid the possibility of noise or mishap , I will give the lady a potion , which will stupefy her faculties , and cause a deep sleep to lock up all her senses for the space of three or four hours . I will so arrange it , that these hours shall be from eleven to three o'clock , and what is done must be accomplished between those periods of time . You shall , therefore , not enter number seventeen until after eleven o'clock , and you must positively leave it before three ; and you shall not let your victim know what transpires at this house until after the Waltons have left the city . Do you consent to these terms ? '' `` I suppose I must . ''