The field for this species of observation is so large and attractive to the antiquarian, that far more time than was at my command, would be required to cultivate it. Early in the present year, Mr. Joshua V. V. Clark visited some of the principal scenes mentioned. Subsequently, at my suggestion and solicitation, he re-visited the same localities and extended his inquiries to others of an interesting character, in the county of Onondaga, descriptions of which are presented under letter [C] of the documentary appendix. [_d._] Ancient fortification of Osco,[64] at Auburn, Cayuga County. [64] This ancient name for the site of Auburn, was communicated to me by the intelligent Onondaga Taht-kaht-ons, or Abraham Le Fort. It is descriptive of the ford or crossing place, which anciently existed above the falls, near the site of the present turnpike bridge. This was crossed by stepping stones, &c. The barks, which made a part of a rude Indian bridge, were, at the time the name was bestowed, nearly overflowed; the crossing was very dangerous, as it was just above the brink of the falls, and it was an act of daring to pass over. The name bestowed at this time became perpetual, although there may have been but little danger in crossing afterwards. The eminence called “Fort Hill,” in the southwestern skirts of the village of Auburn, has attracted notice from the earliest times. Its height is such as to render it a very commanding spot, and crowned, as it was, with a pentagessimal work, earthen ramparts and palisades of entire efficacy against Indian missiles, it must have been an impregnable stronghold during the periods of their early intestine wars. The following diagram, drawn by James H. Bostwick, surveyor, and obligingly furnished by S. A. Goodwin, Esq. exhibits its dimensions: [Illustration] The site of this work is the highest land in the vicinity, and a visit to it affords one of the best and most varied views of the valley of the Owasco, and the thriving and beautiful inland town of Auburn, with its public buildings, prison,[65] and other noted public edifices. The ellipsis enclosed by the embankments, with their intervening spaces, has a circumference of 1200 feet. Its minor dimensions are as follows, namely: [65] One of the most striking evidences of that tendency of the surface limestone stratification of western New-York to assume a fissured character, marked by the cardinal points, is seen in the banks of the Owasco, a short distance below the State prison. From A. to M., 310 feet. “ B. to L., 416 “ Opening at A., 166 “ “ B., 66 “ “ C., 78 “ “ D., 60 “ “ E., 50 “ Wall at F., 275 “ “ G., 145 “ “ H., 278 “ “ I., 52 “ “ K., 30 “