"pettiness they can must"="pettiness they can muster"
Yeah, that happens, a misspelled word from too-fast typing.
One of these days I'm going to have to get myself a scanner for this home computer--right now, when I want to scan a document, I can go to the local library, which is open only from 2 until 4 in the afternoon, or to the local telephone company.
Well, the folks at the local telephone company already took off for the 4th of July weekend.
The deal is, while the computer at the office has all the bells-and-whistles and is less than a year old, this computer here at home is a 186 or 286 something, Windows 95, AOL version 3.0, black-and-white monitor, &c., &c., &c.