sentences:  To the south the Southampton and Dorchester Railway opened in 1847, being absorbed by the London & South Western Railway in 1848.LSWR trains began running from Dorchester into Weymouth, over the GWR line (which had been built to mixed gauge), in 1857.To the north the first line to Salisbury was the 1847 LSWR line from Southampton, and the Great Western had reached Salisbury in 1856.