Nathan could have been using the brand new passenger train service as part of his military commitment.
"The Chester Valley Railroad was built during the early 1850s. It was incorporated April 22, 1850, and was granted a right-of-way on June 10, 1851 from Isaac Walker who then owned this property. The line was 21 miles long, and extended from Bridgeport to Downingtown. The New Centerville station was located on the north west side of the tracks on land where the fire exit crosses the right-of-way. It was originally part of the Old Forge Crossing property, transferred to the railroad as part of their right-of-way grant. The railroad was completed and the first passenger train operated on September 12, 1853.
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During a financial reorganization, the Reading Company gained ownership and the line became known as the Chester Valley branch of the Reading Company. The stations were Bridgeport, Shainline, Henderson, King of Prussia, Maples, Centreville (changed to New Centerville), Rennyson's (later known as Chesterbrook), Howellville, '''''Paoli Road. Cedar Hollow''''', Lees, Valley Store, Malin's, Mill Road, White Horse, Glen Loch, Summit, Exton, Oaklands (became Whitford), Ackworth, and Downingtown." from: https://tehistory.org/hqda/html/v37/v37n3p075.html
Nathan Walters of Tredyffrin definitely had a son,one that never showed up in census data except by inference in 1900.
We also know from County records that he was held accountable for some kind of transgression involving the militia ... see his timeline