Complex sentence: An amendment to the charter on May 12 1857 allowed it to connect with the Allegheny Portage Railroad and the Pittsburgh and Connellsville Railroad, and on March 31 1859, it was grandiosely renamed the Pennsylvania Pacific Railway, with rights to extend into Maryland and Virginia.
Split into simpler sentences: An amendment to the charter on May 12 1857 allowed it to connect with the Allegheny Portage Railroad and the Pittsburgh and Connellsville Railroad. On March 31 1859, it was given the grandiose name of Pennsylvania Pacific Railway, with the rights to extend into Maryland and Virginia.