Wybren
Infrequent visitor.
A day came when two men returned to Ephel Brandir in terror, for they had seen the Great Worm himself. "In truth, lord," they said to Turambar, "he draws now near to Teiglin, and turns not aside. He lay in the midst of a great burning, and the trees smoked about him. The stench of him is scarce to be endured. And all the long leagues back to Nargothrond his foul swath lies, we deem, in a line that swerves not, but points straight to us. What is to be done?"
Glaurung's stench it would be
from the Children of Hurin, Chapter 16, the Coming of Glaurung