tree ring

Besides all the rest, rosy linnets and blue lazuli buntings made the old tree ring with their musical roundelays.

This stand was burned in 1858 (tree-ring date by David Smith) and some charred juniper snags still stood.

Twenty-one of the roof beams in Spruce Tree House have been dated by tree-ring chronology.

Since considerable tree-ring material from these ruins remains yet to be examined, the dates given above are not final.

During 1932 and 1933 further tree-ring research was carried on in this area and additional dates have been secured.