^{page 212 note 1} The Lewisham and Blackheath Scientific Association (like so many local scientific societies) was short-lived, and came to an end in 1893. Hence it seems desirable to give a more detailed account of its work here than would otherwise be the case.

^{page 214 note 1} These sections, reproduced from the report, may be seen in the “Record of Excursions” of the Geologists’ Association, pp. 5–8. They were introduced there to illustrate a very short report of an excursion to Charlton, Blackheath, and Lewisham conducted by Mr. J. Logan Lobley on April 30th, 1881, during which the subsidence at C was visited. The exploration was then in progress.