Although the ground between these two obstructions to the Narrows on its right bank might have afforded a good roadbed, yet undoubtedly they proved to be obstacles that Braddock's engineers, with the appliances which they had at hand, could not easily surmount. It is well known to the older residents of Cumberland that as late as 1873 the mass of boulders at the eastern end of the gap, lying along the right bank of the stream, were in their primitive condition when a wagon road was constructed by George Henderson, Jr., to join the Cumberland road on that side of Wills Creek. On the contrary, the left bank presented no such difficulties in the way of road-building; and a careful examination of the ground through the entire length of the gap cannot fail to convince one that in Braddock's day there was opportunity for the easy construction of a road on that side. After leaving the gap the road turned into the valley of Braddock Run; but the difficulty of finding present traces of it at this point seems almost insuperable on account of the character of the valley itself. The methods employed by Braddock's engineers in laying out the road indicate that its course was probably that afterwards followed by the National turnpike to a point near the northwest corner of the Alleghany Grove Camp Ground,[25] just beyond which and south of the turnpike is a distinct hollow or trench. The neighborhood of Alleghany Grove was unquestionably the place of the first encampment, Spendelow Camp.[26]