To this all, including Horton, agreed.
The descent to where the madman had disappeared was quickly made, but he could not be found.
"Hark!" cried Bob suddenly.
A wild cry of alarm arose on the cold air, coming from off the water.
"It's my mother and Miss Viola crying for help!" Bob went on.
"We must get to them at once!" returned Captain Sumner.
The party were quickly on the snow, running toward the small boat, Bob and Jack leading.
When they came in sight of the craft a scene met their gaze which filled them with horror.
The madman had boarded the boat and was in the act of shoving off.
Terror-stricken, Mrs. Cromwell and Viola shrank back on the stern sheets.