A pine-knot.
1792. A lighted pitch-knot is placed on the outside of a canoe, which not only attracts the fish, but gives the fishermen direction where to strike.Jeremy Belknap, New Hampshire, iii. 90. (N.E.D.)
1825. [In the fire-place], two or three lighted pitch knots, a substitute for candles, were burning.John Neal, Brother Jonathan, i. 58.