Ruthenate perovskites have a diverse range of electronic properties originating from electron-electron correlations within broad 4d bands. We have recently investigated the high pressure perovskite ¿PrRuO3¿ which was initially reported by two groups. It has proved difficult to prepare phase pure samples of this material ¿ it appears to be Ru-deficient according to the composition PrRu1-xO3 (0 < x < 0.25). PrRu1-xO3 and a new analogue, NdRu1-xO3, adopt the orthorhombic Pnma perovskite superstructure. A magnetisation discontinuity at ~90 K is reminiscent of the orbital ordering transition observed in PbRuO3.Powder neutron diffraction data are required to provide accurate structural models for PrRu1-xO3, and NdRu1-xO3. Variable temperature data in the 4-300 K range will be needed to discover any orbital and/or magnetic order associated with the ~90 K transitions.