He showed me that it was covered with manuscript, very closely and laboriously written; but so plainly, that as I looked along the lines, I thought I saw some allusion to King Charles the First’s head again, in one or two places.
When she had entered two or three laborious items in the account-book, Jip would walk over the page, wagging his tail, and smear them all out.
It is laborious, is it not?’
It was very hard, but I turned back, though with a heavy heart, and began laboriously and methodically to plod over the same tedious ground at a snail’s pace; stopping to examine minutely every speck in the way, on all sides, and making the most desperate efforts to know these elusive characters by sight wherever I met them.
There are no more uses of "laborious" in the book.