john, I feel that if the yew gets too dry it becomes brittle. the climate here in central oregon is very dry compare to the valley or other areas with higher humidity. I got some staves from a guy that were 30+ years old, he had moved to prineville from albany and didnt make bows anymore. these were fantastic staves and billets. however, every attempt to build a bow failed, even when sinew or rawhide backed. the wood was just too brittle. I would tend to agree with gordon. I was helping a friend of mine on a yew bow from billets he got that were over 40 years old, not a knot in them. it failed on the tiller tree, not just failed but exploded. I am not sure if you can re-hydrate the wood or not, maybe others know more about this.