V. The field book of said surveyors containing the notes of the resurveys along said line in the years eighteen hundred and seventy-seven, eighteen hundred and seventy-eight and eighteen hundred and seventy-nine; also “the record of monuments” prepared by said surveyors, containing the descriptions of the locations of the several monuments erected by them, and of the witness marks thereto; also the maps of said line, and the vicinity thereof, showing the locations of said monuments; and also the “diary of operations” of said surveyors under the direction of the parties hereto; the same having been duly authenticated by the signature of the said surveyors, and the several documents and books of record containing the transactions of the parties hereto; all of which being placed on the file in the office of the secretary of state of New York, and the office of the secretary of internal affairs of Pennsylvania, shall constitute the permanent and authentic records of said boundary line, and are hereby adopted by the said parties hereto, and made a part of this agreement.