There is no mention of Balyn's sword: this is clearly an interpolation of M.
The passage in question has all the appearance of an interpolation by some scribe.
The aim now was to reconstruct the entire finger print by two successive and independent acts of interpolation.
“—And I believed you, and you know it,” she finished, not noticing his interpolation.
This passage has been set aside as an interpolation by both Spiegel and Haug.
Neither Jane nor Cleigh apparently heard this interpolation.
In addition, the interpolation may be the exact contrary of what the author intended.
The distich may be an interpolation, or at least deeply corrupted in its present form.
It is very possible that it may have been an interpolation of the Christians.
The interpolation is nothing but an exposition written into the text.