Note 139 — Appendix. VARIANTS AND ANALOGUES OF THE TALES IN THE SUPPLEMENTAL NIGHTS, VOL. III.
Richard Francis Burton translation
The Dwarf had told the soldier, on leaving him after killing the old witch, that should his services be at any other time required, he had only to light his pipe at the Blue Light and he should instantly appear before him. The tobacco-pipe must be considered as a recent and quite unnecessary addition to the legend: evidently all the power of summoning the Dwarf was in the Blue Light, since he tells the soldier when he first appears before him in the well that he must obey its lord and master.