I purchased a couple loads of rather old logs from a land clearer/tree service in western Connecticut. Figure I will saw what I can and the rest can go on the firewood pile. There are 6 or so logs with this wood in one of the loads. Wood is lighter in weight than normal ash, maple or oak we generally get around here. Several logs have a rather severe sweep toward the end. Sawing produces "strings" on the board edges even with a new blade. Any help in identifying would certainly be appreciated. I figure he might have thrown in a clump of mature weeping willow but I am not familiar enough with the wood to identify it. Logs are all 12"- 22"in diameter. Thanks for the help.