A great multitude... — This is explained by the facts (1) that the Baptist had been put to death, and that those who had followed him would now follow Christ; (2) that the Twelve had now returned from their ministry in the towns and villages of Galilee; (3) that the Passover was at hand, and that numbers would be flocking from Northern Palestine to Jerusalem.
Followed ... saw... did. — Better, were following... were beholding... was doing. The verbs express a continuance of the actions. It does not mean simply that they saw these miracles on the west of the lake, and followed Him across it; but that He kept on healing the sick, and that the crowds kept on following Him. The usual caravan-road for the northern pilgrims was on the east side of the lake, and the throng would increase as He went.