43 C.F.R. 3841.4–3 further states: “With regard to the extent of surface ground ..., the Act of May 10, 1872, provides that the lateral extent of locations of veins or lodes ... shall in no case exceed 300 feet on each side of the middle of the vein at the surface, and that no such surface rights shall be limited by any mining regulations to less than 25 feet on each side of the middle of the vein at the surface ...; the end lines of such claims to be in all cases parallel to each other ...; and when the locator does not determine by exploration where the middle of the vein at the surface is, his discovery shaft must be assumed to mark such point.” The only State known to limit the width of claims at present is North Dakota which only allows 150 feet on each side of the vein. While Wyoming allows the full width, the side lines must be equidistant from the discovery, i.e., a claim may not have 300 feet on one side and 200 feet on the other. Since the federal law limits the size to 300 feet on each side of the vein, if 200 feet is taken on one side, 400 cannot be taken on the other. The length each way from the point of discovery may be any amount as long as the total does not exceed 1,500 feet. There is no limit to the number of claims any individual, association or corporation may locate. Figure 3 shows three different claim patterns, all of which meet federal requirements. Claim A is the usual rectangle with the full length and width, Claim B shows parallel end lines that are not at right angles to the lode line and side lines. While they are longer than 600 feet, the right angle distance on either side of the lode line is exactly 300 feet. Claim C shows a break in bearing of the lode line at the center of the claim (it could be anywhere on the lode line). Like Claim B, the right angle width does not exceed 300 feet on either side of the center line for any portion of the claim. Corners may be placed on patented land and on other claims in order to obtain the described pattern and achieve parallel end lines with extralateral rights. If the fee owner objects to monuments, witness corners may be used. 43 C.F.R. 3841.4–4 and 3841.4–5 give the minimum requirements for defining and monumenting locations including the recording of location notices. The laws of the various states elaborate on these requirements giving minimum size of monuments and acceptable materials, specifying the points on the boundaries that shall be monumented, giving the contents required in the location certificates and setting time limits for completing discovery work and recording. (See Chapter I.) A wood 4″×4″ post at least four feet in length, well set in the ground, makes a good monument. It should be marked on the side facing the claim with the corner number and initial, if not the full name of the claim. Side centers may be marked S/C and end corners E/C, as required.