recourse must be had to the official plats and field notes of the government survey. The foregoing remarks apply as well to the lines as to the corners of the public surveys; neither must be changed except by the government agent, under the circumstances mentioned above.

Although this rule may in some instances work a hardship to individuals, giving to one party a larger part and to another a smaller, yet it is one of the conditions under which the parties acquire their land, and the evil in these exceptional cases is immeasurably overbalanced by the advantages of having fixed and unchangeable boundaries to the public lands.

RESTORING OBLITERATED BOUNDARIES.

When extinct lines or corners of the public lands are required to be re-established, a county surveyor or other competent person is usually employed by private parties. It is not the province of the General Land Office to direct the operations of any but government surveyors engaged in the public service; yet, obliterated boundaries must be restored in conformity with the laws and regulations under which they were originally established, and the General Land Office, which is the executive office of the land department, and from which all rules and regulations relative to surveying under the U. S. laws emanate, is the most competent source from which to derive such knowledge as will enable the surveyor to perform his work in a proper manner, and instructions from this source carry with them great weight in the settlement of disputed boundaries.

Information of this character has from time to time been imparted in response to the numerous calls of private surveyors; and the directions which follow are based upon the instructions and correspondence of the office upon the subject, running through many years, and are,

it is believed, sufficiently full and explicit to meet all ordinary cases.

If one uniform method had always been employed in establishing the original corners of the public surveys, it would be an easy matter to lay down rules for restoring such of them as from time to time become obliterated. But the system of surveying has undergone modifications at different periods and in various localities, which make it impracticable to give fixed rules that will apply in all

cases.

For instance, the mode of surveying the exterior and subdivisional lines of a township at one period resulted in establishing two sets of section corners on the township boundary; at a still earlier day three sets were sometimes established on the range lines; and the system now in practice requires that the section lines shall close on the corners previously established on the township exteriors, thus making but one set of corners, except on base lines and standard parallels, where "double corners" are established.

To restore extinct boundaries of the public lands correctly, the surveyor must have some knowledge of the manner in which townships were subdivided by these several methods. Without this knowledge he may be greatly embarrassed in the field, and is liable to mistake the corner of one section for that of another, and thereby be led into error. The following brief explanation of the modes which have been practiced, will be of service to surveyors who may be called upon to restore obliterated boundaries of the public surveys.

Where two sets of corners were established on township boundaries, one set was planted at the time the exteriors were run, those corners on the north boundary belonging to the sections and quarter sections north of said line, and those on the west boundary belonging to the sections and quarter sections west of the line. The other set of

corners was established when the township was subdivided. The mode of proceeding was as follows: The north-andsouth section lines were run from the corners pre-established on the south boundaries due north, and at the points of intersection with the north boundaries other section corners were erected. The east-and-west section lines were closed on the corners previously established on the east boundary, but were run on a due west course from the last interior section corner to the range line, and new section corners were planted thereon at the points of intersection. It will be seen that this method resulted in establishing two sets of corners on all four sides of the townships.

When three sets of corners were established on the range lines, the subdivisional surveys were made in the same manner as described above, except that the east-and-west lines, instead of being closed on the corners pre-established on the east boundary, were run due east from the last interior section corner, and new corners were erected at the points of intersection with the range line.

The method of subdividing now in practice requires that the section lines be run from the corners on the south boundary and close on the existing corners on the east, north, and west township boundaries, except where said boundary is a base line or standard parallel. This method is described in detail in the preceding pages of the surveying Manual proper.

With these brief preliminary explanations, we will proceed to consider the

MODE OF RESTORING LOST CORNERS.

From what has been said in regard to the unchangeableness of the government surveys, it will be plain that extinct lines or corners must be restored to the exact locality they originally occupied, if possible. It follows,

therefore, that resort should first be had to the marks in the field. The surveyor should first seek to identify the missing corner on the ground, by the aid of the bearing trees or witness mounds, line trees, etc., described in the original field notes. When two or more witness trees or mounds can be found, they afford the best means for restoring a missing corner to its original position that can be had. If the corner cannot be identified in this manner, clear and unquestionable testimony as to the locality it originally occupied should be taken, if such testimony be obtainable.

After all the rules and instructions that can be given for re-establishing obliterated public surveys, much will depend upon the skill, fidelity, and good judgment of the surveyor for the correct performance of the work. The most difficult point in laying down instructions, and one on which something must be left to the good judgment of the surveyor, is in regard to what shall be considered sufficient evidence in these cases. A definite rule can no more be prescribed in this respect concerning surveying, than a law could be enacted defining just how strong the testimony in a given case should be to satisfy the mind of a justice or juryman. The sound judgment of a competent surveyor in this matter will seldom lead him into

error.

PROPORTIONATE MEASUREMENTS.

In retracing lines it frequently happens that the measurements do not agree with those stated in the government field notes. This discrepancy generally arises from a difference in the length of the respective chains used, or a want of proper care in straightening and leveling the chain, or in sticking the pins, on the part of one set of chainmen or the other, but is sometimes owing to an error in tallying committed by the government chainman. When these differences in measurement occur, the county

surveyor must in all cases establish his corners at intervals PROPORTIONATE to those given in the government field notes. This rule must be observed even if the original interval be one or more tallies too many or too few.

EXTINCT INTERIOR SECTION CORNERS.

To restore a missing section corner in the interior of the
township.

Run a right line between the nearest noted station trees or well-defined corners, north-and-south and east-andwest of the lost corner; and at the point of intersection of the lines thus run, plant the section corner, with new bearings and distances from it to the nearest durable objects.*

EXTINCT SECTION CORNERS ON TOWNSHIP LINES.

1. When the corner on a township line is common to four sections. In this case the corner is common to two sections in one township and two in another, and should be restored in accordance with the directions for re-establishing interior section corners.

2. Where double section corners were originally established, one of which is still standing and it is required to restore the other. It will be borne in mind that the corners established when the exterior lines were run, belong to the sections in the township north and west of those lines respectively. It must therefore first be determined beyond a reasonable doubt to which sections the existing corner belongs. By testing the courses and distances to witness trees recorded in the field notes, and remeasuring given distances from known corners, the surveyor will be enabled to decide this question correctly.

Having ascertained to which township the existing

* But the proportional distance E. N. W. and S. must be preserved.