In February 1850, the PW&B improved its Baltimore terminus by completing erection of a new station, with a 208-foot (63 m) barrel-vaulted train shed. Service onward to Washington, D.C., was facilitated by drawing the coaches by horse down Pratt Street to the B&O terminal, first at East Pratt and South Charles Streets, later after 1857, to the new Camden Street Station. (In 1861, one week after the American Civil War began with the Confederate firings on Fort Sumter, in Charleston harbor, in South Carolina, an angry mob of Southern sympathizers attacked a trainload of future Union Army soldiers of the 6th Massachusetts volunteer state militia, joined in Philadelphia by the "Washington Brigade" of Pennsylvania state militia, heading to Washington to protect the Capital and respond to President Lincoln's call for 75,000 troops and declaring a state of rebellion. Because locomotives were not allowed to transfer through the city possibly for fire safety reasons during their transfer: the "First Bloodshed" of this famous "Pratt Street Riot" set the nation irrevocably on the path to war.) Unwieldy as it was, the arrangement allowed the railroads to temporarily compete with the Philadelphia and Columbia Railroad (renamed Pennsylvania Railroad after 1857) on routes going west from Philadelphia. By 1853, the Camden and Amboy Railroad and New Jersey Railroad were also part of this agreement, providing through service from New York City to the West.