...t the enemy on the wrong scent by means of certain demonstrations along the Lower Rappahannock. About the 21st of April, Doubleday's division proceeded as far as Port Conway, twenty-one miles below Fredericksburg , and made a feint of preparing to build a bridge; two days later, the 23d, a regiment, the Twenty-fourth Michigan, having actually effected a passage in boats, made its appearance in the village of P...