Their forms arc many and various, but most frequently human in shape and somewhat diminutive in size. Like almost all inhabitants of the astral plane, they are able to assume any appearance at will, but they undoubtedly have definite forms of their own, or perhaps we should rather say favourite forms, which they wear when ^t hey have no special object in taking any other. Under ordinary conditions they are not visible to physical sight at all, but they have the power of making themselves so by materialization when they wish to be seen. There are an immense number of subdivisions or races among them, and individuals of these subdivisions differ in intelligence and disposition precisely as human beings do. The gVeat majority of them apparently prefer to avoid man altogether ; hisjiabits and emanations are distasteful to them, and the constant rush of astral currents set up by his restless, ill-regulated desifes disturbs and annoys them. On the other h&nd, instances are not wanting in which nature-spjrits have as it were made friends >vith human beings *an8 offered them such assistance as lay jn their power, as in the wg^-known