Complex sentence: The line ran for 16¼ miles from Banff to Grange, where it joined the main Aberdeen to Inverness line, with a further 3¼ miles on the branch from Tillynaught to Portsoy.
Split into simpler sentences: The line ran for 16¼ miles from Banff to Grange, where it joined the main Aberdeen to Inverness line. There was a further 3¼ miles on a branch from Tillynaught to Portsoy.