The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Q: story: CHAPTER TWELVE.

SAGE CONVERSE BETWEEN HAKE AND BERTHA--BIARNE IS OUTWITTED--A MONSTER IS SLAIN, AND SAVAGES APPEAR ON THE SCENE.

Not long after this an event occurred which produced great excitement in the new settlement; namely, the appearance of natives in the woods. It occurred under the following circumstances.

One morning Karlsefin gave orders for one of the exploring parties to be got ready to go out immediately. Karlsefin's plan from the beginning had been to class his men in two divisions. One half stayed at home to work, the other half searched the land,--always taking care, however, not to travel so far but that they could return home in the evening. They were careful also not to wander far from each other. Sometimes Karlsefin went with the exploring party, at other times stayed at home to superintend the work there, while Biarne or Thorward filled his place. On the occasion in question Biarne was in charge.

Soon after the party had started, Hake, who was one of them, observed a female figure disappear round a copse near the shores of the lake. At that part they were about to strike off into the thick woods, so Hake went up to Biarne and asked leave to go along by the borders of the lake, saying that he could overtake the party again before they had reached the Willow Glen, a well-known rendezvous of the hunters and explorers of the colony.

"Go as thou wilt, Hake," replied Biarne; "only see to it that ye overtake us before noon, as I intend to go on a totally new path to-day." , question: Who were they?
A:
Biarne and Thorward