The sheepmen were divided.

Those on the hills would come in range of the cattlemen's rifles if they attempted to cross the moonlit valley, and in the meantime they were harmless.
A number of volleys were fired into the house, not at the windows, but beneath the window ledges.

When men are besieged in a house they must fire from the windows, kneeling by them.

Several of the cattlemen's bullets tearing through the wooden wall of the house had caught these kneeling figures, and the fire from the place, never accurate, began to weaken.

Mart had another purpose in view, but of that he said nothing.
Possibly he was mortified by the failure of his sheep raid.
Knowing Injun and Whitey as you do, you can imagine that they got as near to this dangerous situation as they could.