Thursday dawned clear and hot. Our neighbors, the fishermen, were out before sunrise and had breakfasted on their catch of perch, catfish and "sunnies" before we were stirring. Old Sol drank up the dew within a few minutes after his appearance over the Virginia hills and we made an excursion into a blackberry thicket where we picked a dish of luscious fruit for breakfast. It was our last berry feast of the season. After reciprocating photographs of our respective "camps," we headed for Seneca lock and were lowered through it by members of a troop of Washington Boy Scouts who volunteered their assistance to the lockmaster. At noon we reached Great Falls. Here are 13 locks in a series of two, seven chambers in the first and six in the second. The actual time in making the descent was considerably less than two hours. We stopped at the first lock, and upon payment of a small fee to the lockmaster, were admitted to the private park surrounding the Great Falls of the Potomac. Crossing a swinging bridge to an island in the river we obtained a magnificent view of the cataract. The stream was at flood stage and the scene rivaled the rapids of the lower Niagara. In the late summer and autumn of 1861 the Union and Confederate pickets frequently exchanged compliments at short range from behind the rocks and boulders along this stretch of the Potomac. If you have any friends among the survivors of the Pennsylvania Reserves, ask them to tell you of their experiences during the open season for snipers in those exciting days. In the middle of the afternoon we passed Cabin John bridge and moored "Sometub" at the lock at the foot of Glen Echo park. In the shade of the trees everything looked cool and refreshing and we decided to spend the evening with friends in Washington, but a few minutes after we stepped off the boat we realized that it was the hottest day of the summer. The lockmaster's wife invited us to go into her house and assigned us "spare rooms" to change our clothes. Going to Washington by trolley, we found the heat in the city almost intolerable after our fortnight in the open air of the mountains. After dinner in town against the protests of friends we returned to the boat and were lulled to slumber by the music in the dancing pavilion of the park. * * * * *