And particularly as regards Science and Health.

She knows, now, that that Annex is going to live for many centuries; and so, what good is a fleeting forty-two-year copyright going to do it?
Now a perpetual copyright would be quite another matter.

I would like to give her a hint.

Let her strike for a perpetual copyright on that book.
There is precedent for it.

There is one book in the world which bears the charmed life of perpetual copyright (a fact not known to twenty people in the world).