...of April, Commissary Patton, of the New York Seventh Regiment, with important despatches from Lieut.-Gen. Scott to Brigadier-General Butler, left Washington for Annapolis in company with Major Welsh, Col. Lander , and Mr. Van Valkenburgh. They took separate seats in the cars, and held no communication with each other. They arrived safely at the Junction, but had no sooner stepped upon the platform, than s...