Many of the common things that occur to us in our walks and rides near home, and which occasionally are noted in our memorandum-books on account of the clearness of their features, or for the sake of some occasional peculiarities in the details observable in them, may not only often prove as useful exemplifications of natural processes and phenomena as facts and instances brought from any distant part of the world, but may bear repeated description and fresh demonstration for the sake of geological enquirers, such as many of the correspondents of The Geologist must necessarily be.