“The claimant should, therefore, prior to locating his claim, unless the vein can be traced upon the surface, sink a shaft or run a tunnel or drift to a sufficient depth therein to discovery and develop a mineral-bearing vein, lode or crevice; should determine, if possible, the general course of such vein in either direction from the point of discovery, by which direction he will be governed in marking the boundaries of his claim on the surface.” Except for the foregoing, the matter of discovery work is left to State law. The general requirement was that the vein (deposit) be disclosed to a depth of ten feet, or deeper if necessary, in a shaft, cut or tunnel. In recent years the tendency is away from requiring discovery work. This was brought about largely through the destruction of the surface by bulldozers digging needless pits or cuts on uranium claims in order to satisfy State law. Drill holes have also been substituted for the usual shaft, cut or tunnel. In some cases the filing of maps has been substituted for discovery work. The statutory requirements for each State are given in Chapter I. This chapter and the statutes themselves should be checked for current requirements. In any event, a discovery point (usually marked by a discovery monument, bearing a notice) should be selected by the claimant from which to recite the dimensions of his claim. If a discovery is made underground, the discovery work requirement is usually met by driving a drift or raise, or sinking a winze on the vein, for ten feet in length; the discovery point is then marked on the surface, with the dip of the vein, if any, projected to the surface. =2–3= Location: 43 C.F.R. 3841.4–1 states: “From and after May 10, 1872, any person ... may locate ... a mining claim 1,500 linear feet along the ... vein ...; or an association of persons ... may make joint location of such claim of 1,500 feet, but in no event can a location of a vein or lode made after May 10, 1872, exceed 1,500 feet along the course thereof....” 43 C.F.R. 3841.4–2 states: “No lode located after May 10, 1872 can exceed a parallelogram 1,500 feet in length by 600 feet in width, but whether surface ground of that width can be taken depends upon the local regulations or State or Territorial laws.... No such local regulations or State or Territorial laws shall limit a vein or lode claim to less than 1,500 feet ... nor can surface rights be limited to less than 50 feet in width....” [Illustration: DISCOVERY CUT Excavated by bulldozer, with discovery monument and location notice at the point of discovery. ] [Illustration: DISCOVERY DRILL HOLE Note the discovery monument in the hole and samples of cuttings taken at each 5 feet of depth. ]