The last detachments to quit the trenches moved off simultaneously all along the front at 1 r :45 P.M., without the enemy noticing their departure, and they were embarked successfully at " V " and " W " beaches according to schedule in spite of the heavy seas.
Hence on beaches and in rivers, such as those of the southeast of England, flint pebbles exist in vast numbers.
There are found strikingly developed marine terraces of gravel, shore lines and surf beaches marked on the solid rock.
The largest class, perhaps, is that formed by the astonishing number of water-fowl which throng the shallow lagoons and river beaches at certain seasons of the year.
The western and northern coasts are regular in outline with long straight beaches; and shallows are common in the seas that wash them.