=4–8= Cancellation of the Survey Order: The most common reason for cancelling a survey order is failure of the mineral surveyor to complete the survey and file his returns. Under these circumstances, both the claimant and the mineral surveyor should be advised 30 days in advance of the action and be requested to show why the order should not be cancelled. If any reasonable explanation is given, the time should be extended. Lacking reasonable explanation the order will be cancelled, notifying both the claimant and the mineral surveyor, and any excess deposit is returned to the claimant. Other reasons for cancelling a survey are a request to do so by the claimant, or if the claim has been declared null and void due to a contest brought by the United States. The mineral survey number of a cancelled survey will not be used again, unless reopened as an amended survey and would then be shown with an “Am.” following the mineral survey number. CHAPTER V The Patent Survey Field Work =5–1= Preliminary: The first step in the field work should be an examination of the property with the claimant or his representative, unless such an examination was made prior to contracting for the survey. A sufficient number of claim corners should be visited to determine the material used, their condition, manner of marking, etc. In the course of such an examination, the claimant should point out known section corners, location monuments and triangulation stations, both of the U.S. Geological Survey and the National Geodetic Survey. The claimant may also be able to identify corners of adjoining and conflicting surveys and locations. If the property is extensive, the claimant may have established his own triangulation network and coordinate system, and if so, it should be incorporated into the survey, although not necessarily made a part of the official record. All the discovery workings should be visited, the discovery points and discovery monuments pointed out. Other workings should be visited and the safety of old underground workings discussed. Maps of underground workings may be available. Workings constructed by third parties should also be identified. Relations with landowners and other claimants in the area may be established with the help of the claimant. In addition to gaining access to the property and to their property for the purpose of executing the survey, they may have helpful information as to the location of section corners and the origin of fences.