The entire party dropped like a flash, and grabbed their muskets. A terrible instant of silence followed, broken by a howl from Cato and a whimper of fright from Molly, who was lying flat on the bottom in her mother's arms. Then a volley of shots rang out from the fiendishly contrived ambuscade, and more than one ball tore through the thick bulwark. But happily no one was hurt, and Barnabas, McNicol, and Nathan at once fired through the three loopholes at which they were posted. A yell of agony blended with another fusillade from the unseen foe, and now a quicker current drove the heavy flat broadside against the mysterious little island. There was a crash of timber meeting timber and a sound of branches smiting the water. Then, with shrill and blood-curdling yells, four painted Indians scrambled over the bulwark and dropped into the boat. At the same instant a little one-eyed man, holding a musket high overhead in one hand, pulled himself aboard at the bow. CHAPTER XIII IN WHICH NATHAN MAKES A PERILOUS SWIM It is more than likely that the Senecas and their white allies underestimated the strength of the party in the flat, or else the discovery and demolition of their ambuscade drove them to such desperate measures. At all events, they speedily found they had made a mistake, and in the brief and sharp struggle that followed they got scarcely a show. Of the four Indians who scrambled over the bulwark three cleared the crouching men and landed beyond them, and the fourth fell heavily on top of Barnabas and McNicol. Before he could use his tomahawk he was pounced upon by the Scotchman, and the two began a lively scuffle. Mrs. Cutbush carried a loaded pistol at her waist, and while she pushed Molly behind her with one hand, with the other the courageous woman drew the weapon and shot one of the three remaining Indians through the head. The second managed to inflict a severe slash with his tomahawk on Cato's arm, and then Barnabas knocked him senseless with the butt of his musket. The third did not wait to be killed, but with a screech, vaulted over the far side of the boat and disappeared, narrowly escaping a shot that Cutbush sent after him. At that moment the Seneca who was struggling with McNicol broke away, leaving his tomahawk in the other's hand, and, as he bounded for freedom, Morgan Proud jumped in front of him. They grappled, and fell heavily against the bulwark. The wall of timbers gave way under the strain and both splashed into the river. There was a quick rush to that side to help Proud, but he and the Indian had disappeared utterly. As the missing man's friends anxiously scanned the water, a Tory belonging to the attacking party scrambled up in the stern of the boat. McNicol instantly saw him and fired, and the man dropped back with a cry.