  Of the 228 sources in the Molonglo Southern 4 Jy Sample (MS4), the 133 with
angular sizes < 35 arcsec have been imaged at 5 GHz at 2-4 arcsec resolution
with the Australia Telescope Compact Array. More than 90% of the sample has
been reliably optically identified, either on the plates of the UK Schmidt
Southern Sky Survey or on R-band CCD images made with the Anglo-Australian
Telescope. A subsample of 137 sources, the SMS4, defined to be a close southern
equivalent of the northern 3CRR sample, was found to have global properties
mostly consistent with the northern sample. Linear sizes of MS4 galaxies and
quasars were found to be consistent with galaxy-quasar unification models of
orientation and evolution.
