his boots, and, with two vigorous jerks, hauled them on, and then
seizing his hat, like any bird, stood poised for his flight across the
channel.

"Well done, my honest friend," said the Doctor; "you have the papers in
your heel, I suppose."

"Ah," exclaimed Israel, perceiving the mild irony; and in an instant his
boots were off again; when, without another word, the Doctor took one
boot, and Israel the other, and forthwith both parties proceeded to
secrete the documents.

"I think I could improve the design," said the sage, as,
notwithstanding his haste, he critically eyed the screwing apparatus of
the boot. "The vacancy should have been in the standing part of the
heel, not in the lid. It should go with a spring, too, for better
dispatch. I'll draw up a paper on false heels one of these days, and
send it to a private reading at the Institute. But no time for it now.
My honest friend, it is now half past ten o'clock. At half past eleven
the diligence starts from the Place-du-Carrousel for Calais. Make all
haste till you arrive at Brentford. I have a little provender here for
you to eat in the diligence, as you will not have time for a regular
meal. A day-and-night courier should never be without a cracker in his
pocket. You will probably leave Brentford in a day or two after your
arrival there. Be wary, now, my good friend; heed well, that, if you are
caught with these papers on British ground, you will involve both
yourself and our Brentford friends in fatal calamities. Kick no man's
box, never mind whose, in the way. Mind your own box. You can't be too
cautious, but don't be too suspicious. God bless you, my honest friend.
Go!"