66 Peacock: Linc. Naturalists at Woodhall Spa and Tumby. 
from this place and examining these ancient gravels for flints 
and quartzite pebbles it is found that the flints gradually 
decrease and the quartzites increase in quantity, until at Bardney 
the flints are almost absent and the gravel is almost altogether 
noticed again until, having passed through the Lincoln gap, 
they reappear and extend in a south-westerly direction as far as 
‘the Trent valley at Newark, all the way displaying the same 
characteristic abundance of quartzite pebbles. Following then 
the valley of the Trent, these same sige pebbles occur until 
‘near Nottingham, the source whence they are derived, is 
by the river Trent. Thus we have spent the day on the tail 
end, as it were, of the alluvial deposits of an ancient river 
Trent which, soon after the Glacial period, ran eastwards from 
Newark through the gap at Lincoln and on towards the Wash, 
__ instead of northwards into the Humber, as at the present time. 
s The Witham and the Fen deposits of the Witham valley are all 
i subsequent in date to these ancient quartzite gravels, and point 
to a different origin. Incidentally, Mr. Preston said that as he 
and Mr. Kirkby passed through Tattershall that morning they 
which the clay was mixed previous to burning, for studded all 
over the burnt clay were to be found quartzite pebbles and flint 
fra wea ents ranging up to as much as an inch in diameter. This _ 
ee was noticeable also in the mortar, and clearly showed that the 
: seed quartzite and flint gravels of the neighbourhood had been 
run upon in connection with the building of Tattershall Castle. 
Personally I was too busy working at entomology to take 
much interest in botany. But the Rev. W. Fowler, Rev. F. S. 
_ Alston, and Mr. B. Crow each kindly sent me a list. Less than 
200 flowering plants and ferns were noted. The best things 
were Nepeta Cataria, Hieracium umbellatum, Marrubium vulgare, 
Salix aurita, Samolus Valerandt, Scabiosa Columbaria (a lime- 
loving plant, common enough on limestone and chalk), Calama- 
grostis lanceolata, Corydalis claviculata, Maianthemum bifolium. 
he = . J. Conway Walter sent me the following list of 
Mammals :—Fox, Hare, Rabbit, Mole, Squirrel, Badger (rare), 
Otter aces Hedgehog, Hanover Rat, Water Vole, House 
: Mouse, Common Shrew, Common Field Vole, Foumart (rare), 
©. Stoat ond Ermine partly white in winter, but he has seen them 
; “Naturalist 
composed of quartz and quartzite pebbles. These beds are not _ 
reached, viz., the Bunter Pebble Beds, "Which are there skeen 4 3 
