eight
o'clock exactly
I wanted you to be . It was quite necessary that they should know and be able to recognise you again -- to disabuse their minds later on of the possibility that I might be masquerading in your clothes ; and also , of course , that they should know who you were , and what your position was in the household . Very well ! To-night , at eight o'clock exactly , you are to go out from the back door of the house to the garage . On the way out -- it will be quite dark then -- I want you to drop something , say , a bunch of keys that you had been jingling in your hand . You are to experience some difficulty in finding it again , move about a little to force any one that may be lurking by the garage to retreat around the corner . Grumble a bit and make a little noise ; but you are not to overdo it -- a couple of minutes at the outside is enough , by that time I shall be under the car seat .