A good bottom may be formed by chalk rammed down close.
A naval battle was fought on the 5th of May 1864, in which the double-ender "Sassacus" most gallantly rammed the "Albemarle" and was disabled alongside her, and Smith's vessel and others, unarmoured as they were, fought the ram at close quarters.
Most people just want to read a good story, not get someone's artistic pretensions rammed down their throat.
Such stones may be of any size subject to each of them covering only a small proportion of the width of the structure (in the Vyrnwy dam they reached 8 or 10 tons each), and the spaces between them, where large enough, must be similarly built in with smaller, but always the largest possible, stones; spaces too small for this treatment must be filled and rammed with concrete.
The date was confirmed when, during the removal of the rammed chalk and clay floor, a papal bulla was found.