Complex sentence: Early in 1842 the nominally independent Shildon Tunnel Company opened its tunnel through the hills at Shildon to the Wear basin and after laying of track from Shildon, South Church station, south of Bishop Auckland, opened in May 1842.
Split into simpler sentences: Early in 1842 the nominally independent Shildon Tunnel Company opened its tunnel through the hills at Shildon to the Wear basin. After laying of track from Shildon, South Church station, south of Bishop Auckland, opened in May 1842.