62 Mr. N. F. Robarts’s Notes on the 
What the general manager of the Company would have to put 
up with if these slips were repeated in 1904, I am unable to con- 
ceive, though possibly the engineer would be equal to removing 
the obstacle more expeditiously than his predecessor. 
I might point out that these great landslips followed a year of 
excessive rain. Our President informs me that 1841 was a very 
wet year, the rainfall at Greenwich being 83°26 in., and was 
only exceeded in, 1852 and 19038. 
The mass of clay was greater in 1841 than in 1903, the cutting 
then being far deeper and narrower than it has been since the 
great slip ; but the effect of the heavy rains last year show the 
disposition of the clay to slide after very heavy rains. It was 
very noticeable last summer how the clay crept forward over the 
lower bed E, which never seemed to shift. 
According to Mr. Gregory, the first slip ‘‘ was materially 
assisted by the natural dip of the strata from west to east, and 
by the fact of the western slope being on the inside of the curve, 
thus leaving the slope less supported laterally.’”’ The following 
is the section given by Mr. Gregory, the depth of the original 
cutting at the centre line being about 75 ft., rising to 80 ft. on 
the western side :— 
Yellow clay. FT, IN. 
SEIT GICIAY isstsececsascsesrdrlesccerelsvcscaetaresee 10 ft. to 15 0 
FiolledeHimt Si lGy | sieeccuspeascctndsssecrelesnsecsasanwen 1 10 
THENNG BAU Pewachacaeivesdives cousins sP¥eaeeuapsine cs tagsee es 0 3 
IGS Toss Gehgen ace ccocoh pba pocadenel posnacec adaedoceings oaierc 0 Of 
ITO ISHII vessey ces sdsamsacnaccss usceadente deste anaes seeders: 2 0 
Ferruginous sand with fossils ..........sssssesessesseess 0 4 
Loose grey sand with fossils .......csssecseceeseeseeeee 0 8 
MELON POMC Glalyosnssaes <asevess celts ceveesee cn sseenest=samceye 0 10 
Black clay and sand with fossils..........ssssesseeesees 0 9 
Black idirty Sand. fs .tes.ccesstsaccocudusssaseasscacacsnrsatrs 0 4 
Dark sand with fossils, oysters, KC. ..sssesseseseeeees 0 6 
PITOUOMWINMMORSING) aaah cess Gaidaestaeracasertacecsansucrsce 0 6 
Decomposed stone and sand with fossils ............ 0 38 
Plastic clay. 
The next published record of this cutting is that by Mr. Henry 
Warburton,* who received from Mr. Simms the following 
section :— 
London Clay, the lowest bed of which, from 10 to 
15 ft. thick, is of a blue colour. FT. IN. 
Rolled flint pebbles .........sssssesessseeceseecseeesveeees 1 10 
Hine fawn-Coloured SANG ses iccccecessdscoccceesesesecedee 0 8 
iiomitiopeeeesraccses detasscresssesncestesworecacedeceseorensnte 0 of 
* «©On the Occurrence of a Bed of Septaria, containing Fresh-water 
Shells, in the Series of Plastic Clay at New Cross, Kent’’ (Quart. Journ. 
Geol. Soc. 1845, p. 172). 
