WED. FEB. 24, 1969 of this mem. Keith said it undoubtedly was a piece of one of two lenses, and the beam came by the fossil actually collected from the first smaller lens. See opposite. Then went further north to see the later lens in place. This one rises abruptly only to there, putting 20 feet high and some tiny little 200 feet across north and south and extend north. It has many tiny grains in it. He made no attempt to collect fossils. Those are all his lenses from in situ. Roedledge is the matrix of St. Albans may be another one in place; the big boulder in the fountain canal, to the south about 1/2 mile, was a boulder that I attempted and may lying in the mouth of the canal entrance. There are several what looks like reef structure as in the lenses to the north. with here and there a falling in small piece. In the afternoon went north to Highgate to see the Meni's quarry. Last year flood has cleared up the basal strata, and now one can make out a complete section and gather a more detailed collection of fossils. This I order done at day for later.