From Petter B Øvrebust at a neighbouring farm in Stordal. Collected by William Holden. Petter still brews raw ale, pitches at 30C, ferments 2-3 days.
Commercially available from [[Saccharomyces#Mainiacal_Yeast|Mainiacal Yeast]]. One isolated strain is available from [https://sleightbeerlab.com Sleight Beer Lab; product "Fehu Nordic"].