Or he could google the regiment! It's all on the internet now. I have noticed anytime someone finds something really nice (yes it has happened to me), there is always someone who contacts me wanting to buy it. For instance the 3rd was raised in Philly in 1775, fought at Brandywine, Monmouth, Springfield, Valcour Island, disbanded in 1783. Buttons are well known. Several have come out of the Phiiladelphia area. I also remember a few came out of the Hudson Highlands. Valcour Island is very close to Phillipsburg, NY. I used to dig Brandywine but the soil is so bad there it eats up the pewter buttons.