"Evans the Break" as the prison officers called him. Thrice he'd excaped from prison, and but for the recent wave of unrest in the maximum security establishments up north, he wouldn't now be gracing the governor's premises in Oxford; and the Governor was going to make absolutely certain that he wouldn't be disgracing them. Not that Evans was a real burden: just a persistent, nagging presence. He'd be all right in Oxford, though: the Governor would see to that-would see to it personally.
What does this paragraph mean? Was Evans being shifted from Oxford? Is he being shifted to Oxford prison? What's with the 'and but for the recent...'
From what I infer it sounds like he was staying at the Governor's premises and now being shifted to Oxford, but that doesn't add up.
Here's the pdf version of the story for a quick read: https://ncert.nic.in/textbook/pdf/levt107.pdf