descriptive vs. locative calls

The description of the land to be acquired, which every entry must contain, may be divided into general and special. The general description must be such as to bring the holder of a warrant to be located into the neighbourhood of the land already appropriated, and such as to enable him to find that land with reasonable diligence; the special description, or, in the technical language of the country, the locative calls of the entry, must be such, as to ascertain and identify the land.