In 1831 he met
Ole Bull in Bergen and became his friend for life. Bull was on a short visit between tours, and was at the time looking for a personal and national expression. He had not yet opened his mind for the rural music, but when hearing Myllarguten, he got exactly what he had looked for. Later, he said: "There has not been a one fiddler that has made me content in such a way". The two understood each other, and soon became friends. Bull wrote down some of the tunes he heard, and borrowed Myllarguten's fiddle, and in turn played classical music for the fiddler. They both came enriched from the meeting, and Bull always played some Norwegian folk music on his concerts after this. Thus, he made the rural tunes known to a larger public for the first time. The meeting had lasting impact in the evolving
romantic nationalism in Norway. After this meeting, they did not meet again for 17 years, until Bull endeavored to make a concert with Myllarguten in Christiania February 1849, when romantic nationalism was at its very peak in Norway. The concert became a commercial success, and the hall was packed with 1500 excited listeners, among them some from Telemark, who had got free tickets. The known author
Aasmund Olavsson Vinje decided not to go, afraid that the concert might go awry for the sensible fiddler, and would not be held responsible as a man from the same district, which he was. When going on stage, Myllarguten had to break his crate open with a knife, and was delayed several minutes. This made him nervous, and he started playing other tunes than the appointed. But he soon played himself into ecstasy as was his wont, and the audience cheered. Newspapers called him a "true child of nature", and praised him with eulogies and poems. On the other hand, the urban audience was more excited by the event than the music, as the traditional music was and is a music for trained ears. When the romantic wave died down, Myllarguten became a has-been, and was regarded as nothing more than a "drunken Telemark farmer". The concerts gave him money to raise a farm in
Rauland, and the more experienced farmer Rikard Aslaksson Berge helped him in this. Myllarguten had played at his wedding, and was a regular guest at the farm. Thus, his music was passed on to Rikard's sons, and from them to his grandson
Eivind Groven. ==Later years==