Ydalir it is called, where Ullr has himself a dwelling made.
"The Elder Eddas of Saemund Sigfusson; and the Younger Eddas of Snorre Sturleson" by Saemund Sigfusson and Snorre Sturleson
Farther east, the dirty gray woodsmoke of Ullr marked the progress of the charcoal-burnings.
"Ullr Uprising" by Henry Beam Piper
Where Ullr has Himself a dwelling made.
"Myths of the Norsemen" by H. A. Guerber