The rotation-curve for the Virgo cluster of galaxies and the so-called Southern extension is presented. The two appear distinct in their radial velocity distributions and, in addition there appears to be another grouping associated with NGC 4261. The masses of the two clusters are (1.3 +/- 0.2) E+15 and (1.6 +/- 0.2) E+14 solar masses respectively. The central densities are 3.5 +/- 1.0 E-25 and (2.6 +/- 0.8) E-26 gm cm-3. The period of revolution of the two clusters about each other is about 3.4 x 1011 years; more than ten Hubble ages. This latter factor and the discovery of a previously unsuspected shell wherein the numbers of direct and retrograde moving galaxies are equal provide further damaging evidence against the prevailing modern cosmogony.