He was too delighted with the chance of escaping all the horrors enumerated to think of aught else, and he even forgot to beg for Rachel to come and sit beside his bedside, as he had intended doing, until the blisters began to remind him that they stuck closer than a brother.

After that he devoted his entire attention to them, as a man is apt to.
A good-sized blister, made according to the United States Pharmacopoeia, has few equals as a means of concentrating the attention.

When it takes a fair hold of its work it leaves the gentleman whom it patronizes little opportunity to think of anything else than it and what it is doing.

Everything else is forgotten, that it may receive full consideration.

Then comes in an opportunity for a vigorous imagination.
No one ever underestimates the work done by an active blister, if it is upon himself.