IV. A large monument of granite, erected in the year 1884 by the said surveyors six hundred feet west of the center of the Delaware river in the said line originally fixed in the year 1786, to mark its eastern terminus; a large monument of granite erected in the year 1884 by the said surveyors in the said line or meridian boundary, as originally fixed in the year 1790, one hundred feet north from its intersection with the line originally surveyed as aforesaid, in the year 1787, which said point of intersection is marked by a small monument of granite buried in the center of the highway, in 1884, by the said surveyors; and also a large monument of granite erected in the year 1869 by John V. L. Pruyn, George R. Perkins, Samuel B. Woolworth and George W. Patterson on the part of the state of New York, and William Evans on the part of the state of Pennsylvania, four hundred and forty feet south of the original monuments erected in the year 1790, by Andrew Ellicott aforesaid, upon the south shore of Lake Erie in the line originally surveyed and marked by him as aforesaid.