1.:--

"But these sweet thoughts do even refresh my labours;
Most busy, least when I do it."

This is the way in which I ventured to print the passage, depending
mainly upon the old copies. In the folio, 1623, where the play for the
first time appeared, the last line stands:

"Most busie lest, when I doe it;"

and in that of 1632,

"Most busie least, when I doe it:" {300}

so that the whole merit I claim that of altering the place of a comma,
thereby, as I apprehend, rendering the meaning of the poet evident. The
principle upon which I proceeded throughout was that of making as little
variation as possible from the ancient authorities: upon that principle
I acted in the instance in question, and I frequently found that this
was the surest mode of removing difficulties. I could not easily adduce
a stronger proof of this position, than the six words on which the doubt
at this time has been raised.

Theobald made an important change in the old text, and his reading has
been that generally adopted:--

"Most busy-less when I do it."

In restoring the old text I had, therefore, to contend with