Page 20 of A Deepness in the Sky:
"Tas been done often enough afore, dontcha know? Get ‘em when they don’t know technology—or haven’t yet rebuilt it,” said Brughel.
What does "Tas" mean?
Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. It only takes a minute to sign up.Sign up to join this community
For clarity, this word should probably have had an apostrophe, indicating that the word is a contraction of "It has"
"It has been done often enough before, don't you know. Get them when they do not know technology, or have not yet rebuilt it"