You've got some bits that I didn't, so adding in what I think I saw:
Def convicted of the offence
as charged and ordered to
pay for fine two shillings &
sixpence with one shilling
& sixpence costs and ordered
if in default of payment
Most of the last part looks as though it might be struck out and/or overwritten, but I'm not sure I've got that bit right anyway.
Failure to pay a fine might mean the alternative was a short stretch inside, but from the few I've seen before, these sentences tend to use a fairly standard set of phrases, so is there anything else on the page that would shed light on it?