in the field for the purpose of actually establishing the line, which meeting occurred in July, 1893. Nearly two months were occupied in the surveys necessary to the establishment of the ranges agreed upon and in the erection of the shore signals. It was agreed that the line should be marked by buoys at the turning-points, but as the strong tidal currents which there prevail promised to make it difficult, if not impossible, to hold these in their places it was determined to mark each straight segment of the boundary by prominent and lasting range-signals so that it could be followed without regard to the buoys, and cross-ranges were also established by means of which the latter could be easily replaced if carried away. Permanent natural objects were in a few instances used as range signals, but for the most part they were stone monuments, conical in form, solidly built, from five feet to fifteen feet in height, and painted white whenever their visibility at long range was thus improved. At the close of the work, first-class can-buoys were placed at the principal turning-points, although with little hope of their remaining in place. As a matter of fact, it was found impossible to keep in place more than three of the six or seven put down, but, fortunately, these are at the most important points in the line. As already stated, the commissioners had failed to agree, in Washington, as to the direction of the line around Pope’s Folly Island, and on further investigation of the facts they were not drawn together on this point. As the work in the field progressed, other important differences developed which finally prevented the full accomplishment of the work for which the commission had been appointed. A brief discussion of these differences will properly form a part of this paper.