Fafnir his foster-son Sigurd to kill the dragon. Regin instructed Sigurd to dig a pit in which he could lie in wait under the trail Fáfnir used to get to a stream and there plunge his sword, Gram, into Fafnir's heart as he crawls over the pit to the water. Regin then ran away in fear, leaving Sigurd to the task. As Sigurd dug, Odin appeared in the form of an old man with a long beard, advising the warrior to dig more trenches for the blood of Fafnir to run into, presumably so that Sigurd does not drown in the
Investigations into Germanic Mythology concluding in part that it was not more widely received because it was not fully available in one of the three international languages of scholarship: English, German or French. A German translation was being prepared in 1889 by literary historian, Phillip B. Schweitzer, who died in a skiing accident shortly thereafter. A French translation planned by a group of scholars in Lund in 1891 was never completely realized. Rydberg himself knew that his mythology would be regarded as "folly" to the German philologists, who, as adherents to the school of nature-mythology, regarded him as a heretic, in regard to his