that same autumn thorbrands sons fell to talk with egil that he should go to the ball-play and slay some one of the broadwickers , either biorn or thord or arnbiorn , in some wise , and that he should have his freedom after therefor ; and some men say that that was done by snorris rede , and that he had so counselled that the thrall should try if he might get into the hall by stealth , and thence whereas he lurked do somewhat for the wounding of men ; and he bade him go down the pass which is above playhalls , and go down thence when the meal-fires were kindled ; for he said it was mostly the way of the weather that a wind would blow off the lava in the evening and drive the smoke up into the pass .