Here is a nice free blown squat cylinder bottle (c.1790s) I found  buried in the sand. I had been fanning a large trench about 20" deep and was finding lots of pottery shards and broken black glass bottles, after about two hours I found this nice intact one, it is in really great shape. I am sure there are more in the area...I found it in the same spot I had been digging when I found the large pottery pieces pictured in a previous post - July 4