Till the 25th of March, Mr. Sinnett is expected to keep his lips closed as they will be in death — three score and ten hence. Not a soul, but Mrs. S., your good lady, must know one word of this letter. This I expect of your friendship, and now put it to test. To Mr. Hume — you may write just now, so that the letter might be received by him on the 24th, in the afternoon. Your future depends on this, — your silence.