With a view of having correct data of the tornado, and placing the same upon record, in company with my friend and schoolmate Edwin Walton, of Highland township, I passed along the route of the storm-cloud. The first point of observation was near the residence of Jos. D. Pownell, Lancaster Co., Pa. He gave us a short account of the cloud, and of the movement of the currents of air which formed it. As he sat upon the front porch of his residence, he saw a strong current of air blowing from the south-west. To the north a storm had just passed, and a powerful current set in from that direction and blew directly across, coming in conflict with the current from the south-west. The whirl commenced on their coming together, and was set in motion about half-a-mile from his house and one mile south-east of the Gap station. This rotary motion or "whirl" probably resulted from the resistance encountered by these opposing currents of air, in their attempt to ascend vertically, there being less resistance in a lateral than in a vertical direction. The first movements of the cloud thus formed were of a decided character. Some children that were playing in a field near by, saw the danger ahead and fled to a lime-kiln, thus saving their lives. The cloud now reached a stream of water, and Mr. Pownell says the water was taken up and carried into the funnel of the cloud, leaving the bed of the stream dry. It now approached his house with a continuous roaring sound, and he fled within. It passed along the north side of his house, overthrew his orchard, destroyed part of his corn crop, carried an apple tree fifty yards, and cut a track 150 yards wide and proceeded in the direction of Sadsbury Meeting House. His loss was about $300. The first building struck was a tenement house on the property of Elwood Pownell. It was located on the top of a hill that overlooked the surrounding country; an old colored man named Robert Johnston occupied it. The building was leveled to the ground. He stated that he was coming up the hill as the cloud approached, and sought safety by leaning against the bank and holding firmly to the fence; he was not injured. He is now living in the _cellar_ of the house and crawls out into daylight when it is necessary; no movement is being made towards rebuilding his dwelling. Loss, $200. The storm-cloud next passed over Elwood Pownell's property. His wagon shed and carriage house are gone, and a large number of his apple trees was overthrown. His farming utensils were swept away, and the barn itself was moved fourteen inches from its foundation. The fences on the property were more or less demolished, but his whole loss was not very great. He states that his father-in-law was paying him a visit on that afternoon, but was unable to get home in the evening as his carriage was seized by the storm and carried away. Mr. Pownell further states that he saw the wind coming, and with the greatest difficulty reached the house, being