Alloys in the system Ni.95S Fe exhibit uniaxial anisotropy which is similar in magnitude to the exchange. Ni.95S is a non‐magnetic d‐band metal and iron a magnetic impurity, so the system bears some resemblance to an Ising spin glass. Anisotropy modifies the magnetic properties as compared with a normal spin glass, giving a susceptibility more like that of an antiferromagnet. The maximum in &khgr;∥at the freezing temperature Tfretains its form but shifts to lower temperature with increasing field. A sharp increase in the parallel magnetization below Tfin a large applied field is identified as spin flop of iron in the weakest exchange fields.