Proceed with some caution. Some of those old lemonwood longbows are more likely wall hangers these days. Photos would be helpful. Any labels, stickers, emblems, number markings?? If you take to an archery shop realize that unless they have been involved in archery a long time or they have an intersest in older archery stuff they may not know anything about your bow. If you decide to string it work the bow in a little. Draw less than half way mulitiple times several times a day, do that for a couple of days, then start drawing past half way mulitiple times several times a day over several days, then draw to full draw. Listen to the bow while doing so. Don't leave strung between sessions. Hang the bow on a peg or lay flat with back(the flat of the bow that faces away from you) up. You might have a nice old shooter you might have a nice old wall hanger, hard to know at this point.