six o'clock
At six o'clock you will drop the bundle , carefully made up and nicely secured , as I shall direct Mr. Simpson , right through the centre of the hole , to which I will direct you by and by , -- always being very careful to let it fall from your hand at a height of four feet above the surface of the earth ; in which case it will , of course , rise just four feet _ above _ the surface on the other side , and I shall be able to secure it without difficulty . I will pay you fifteen per cent on the net profits of the enterprise for the first six months , which ought to be regarded as a liberal compensation for the small amount of time that you will be obliged to give to the work . `` Now , Bob , listen to what I am about to say with strict attention . On every Saturday morning you must delay dropping your bundle for half an hour ; and between six and half-past six o'clock , be on the careful lookout for a bundle _ which I shall send to you _ from the other side . This will contain my remittance for the week , which I wish you to deposit to mother 's credit in three places , the names of which I give you on paper . She can then draw from time to time such sums as she may need . `` I shall remain at home for a few days and arrange to be in China next Monday evening .