We passed the mouth of the river Tyne, south of which stands Dunbar. The next place of interest we came off was Fast Castle, of which two tall towers remain close to the cliffs,--in former days the stronghold of the Homes.  It is supposed to be the original of Wolfs Crag in _The Bride of Lammermoor_.  We looked through our glasses at the spot where the unhappy Master of Ravenswood sank with his steed into the treacherous quicksand.