The one arrowhead has the letters P. Is. On it and I am not positive but I would say that one was found on Peavine Island which is located between Holtwood and Drumore, Pennsylvania. That one is 3 1/8 inches long. The other one has Lanc. Co. Which would stand for Lancaster County and this one is 2 7/16 inches long. You will see some pictures of the front and back of a paper from Marburg auctions which specializes in selling genuine Native American Indian artifacts. I am keeping two of the arrowheads and selling two(those that are circled). That paper will be included in this auction. Both of the points are in excellent condition.