We have detected the rare phenomenon of stable , drifting sub-pulse behaviour in two pulsars discovered in the recent Swinburne intermediate latitude pulsar survey .
The pulsars ; PSR J1231–47 and PSR J1919+0134 , have approximate periods ( P ) of 1.873 and 1.6039 seconds respectively .

Both pulsars have multi-component profiles , and distinct drifting is observed across them .
We have identified a single drift mode in both pulsars : the drift rate for PSR J1231-47 being 5.4 ( 1 ) ms P ^ { -1 } and 5.8 ( 2 ) ms P ^ { -1 } for PSR 1919+0134 .
The drifting is linear across the profile with no departure from linearity at the edges within the sensitivity of our observations .