The Fort in the Wilderness by Edward Stratemeyer

"This is truly horrible!"

Rodney uttered the words, after listening to the account of another attack by the Indians. The party had been at Carlisle three days, and a dozen men had come in with reports of the settlement in Shearman's valley, and on the Juniata. It was the old story of bloodshed and burned cabins and haystacks, and stolen cattle. A boy was there -- a tall, half-crazed youth of thirteen, -- who had seen his father, mother, and two sisters slaughtered before his eyes. No one could comfort the lad, although many tried.