from The Century Dictionary and Cyclopedia
- n. See dool-tree.
Sorry, no etymologies found.
Grace's regality comes beyond this, and what does he do but put up his dule-tree there that I may see it from my window and mind the fact.
By now young Harden was safe in the lowest dungeon, and right well they knew that only once again would he breathe the fresh air of heaven, and that would be when he was led out to die under the great dule-tree on the green.
"dule-tree," as he had expected, he was taken into the great hall, and stationed close to one of the narrow windows.