The difficulties which faced the Baltimore enthusiasts in their task of keeping their city "on the map" would have daunted men of less heroic mold. Every conceivable trial and test which nature and machinery could seemingly devise was a part of their day's work for twelve years--struggles with grades, locomotives, rails, cars. As Rumsey, Fitch, and Fulton in their experiments with boats had floundered despondently with endless chains, oars, paddles, duck's feet, so now Thomas and Brown in their efforts to make the railroad effective wandered in a maze of difficulties testing out such absurd and impossible ideas as cars propelled by sails and cars operated by horse treadmills. By May, 1830, however, cars on rails, running by "brigades" and drawn by horses, were in operation in America. It was only in this year that in England locomotives were used with any marked success on the Liverpool and Manchester Railroad; yet in August of this year Peter Cooper's engine, Tom Thumb, built in Baltimore in 1829, traversed the twelve miles between that city and Ellicott's Mills in seventy-two minutes. Steel springs came in 1832, together with car wheels of cylindrical and conical section which made it easier to turn curves. The railroad was just beginning to master its mechanical problems when a new obstacle confronted it in the Potomac Valley. It could not cross Maryland to the Cumberland mountain gateway unless it could follow the Potomac. But its rival, the canal, had inherited from the old Potomac Company the only earthly asset it possessed of any value--the right of way up the Maryland shore. Five years of quarreling now ensued, and the contest, though it may not have seriously delayed either enterprise, aroused much bitterness and involved the usual train of lawsuits and injunctions. In 1833 the canal company yielded the railroad a right of way through the Point of Rocks--the Potomac chasm through the Blue Ridge wall, just below Harper's Ferry--on condition that the railroad should not build beyond Harper's Ferry until the canal was completed to Cumberland. But probably nothing but the financial helplessness of the canal company could have brought a solution satisfactory to all concerned. A settlement of the long quarrel by compromise was the price paid for state aid, and, in 1835 Maryland subsidized to a large degree both canal and railroad by her famous eight million dollar bill. The railroad received three millions from the State, and the city of Baltimore was permitted to subscribe an equal amount of stock. With this support and a free right of way, the railroad pushed on up the Potomac. Though delayed by the financial disasters of 1837, in 1842 it was at Hancock; in 1851, at Piedmont; in 1852, at Fairmont; and the next year it reached the Ohio River at Wheeling.