The subjects had reference not merely to matters of present interest, but to the former history of their nation, and were directed "to the preservation of the memory of famous men, and to the recollection of events and actions of note." Therefore, their Agamemnons felt no anxiety for the absence of a Homer, but "confidently reckoned that their noble deeds would be held in memory long after their bodies had perished."[100] The material on which the drawings were made was generally so perishable that few examples have been left to us. One, a stone about seven inches long, found in central New Jersey, has been described and figured by Dr. Abbott.[101] It represents an arrow crossing certain straight lines. Several "gorgets" (smooth stone tablets pierced with holes for suspension, and probably used for ceremonial purposes), stone knives and pebbles, showing inscribed marks and lines, and rude figures, are engraved in Dr. Abbott's book; others similar have been seen in Bucks and Berks counties, Pa. There was a remarkable series of hieroglyphics, some eighty in number, on a rock at Safe Harbor, on the Susquehanna. They have been photographed and described by Prof. T. C. Porter, of Lancaster, but have yet to be carefully analyzed.[102] From its location, it was probably the work of the Susquehannocks, and did not belong to the general system of Algonkin pictography. If the rude drawings appended to the early treatises as signatures of native sachems be taken as a guide, little or no uniformity prevailed in the personal signs. The same chieftain would, on various occasions, employ symbols differing so widely that they have no visible relation.[103] An interesting incident is recorded by Friend John Richardson when on a visit to William Penn, at his manor of Pennsburg, in 1701. Penn asked the Indian interpreter to give him some idea of what the native notion of God was. The interpreter, at a loss for words, had recourse to picture writing, and describing a number of circles, one inside the other, he pointed to the centre of the innermost and smallest one, and there, "placed, as he said, by way of representation, the Great Man."[104] The explanation was striking and suggestive, and hints at the meaning of the not infrequent symbol of the concentric circles. An alleged piece of Delaware pictography is copied by Schoolcraft[105] from the London _Archæologia_, Vol. IV. It purports to be an inscription found on the Muskingum river in 1780, and the interpretation is said to have been supplied by the celebrated Delaware chief, Captain White Eyes (Coquethagechton). As interpreted, it relates to massacres of the whites by the Delaware chief, Wingenund, in the border war of 1763.