70

[1 January 1872]

Perhaps the furrows in upper part of slope were originally shallower

Why should not the furrows have become obliterated by weather before the turf grow

There were plenty of worm castings 1/2 way up the slope, I forgot to see if there were many at top of slope

71

3/4 of mile from Stonehenge

Grass slope about one mile south of Stonehenge

Grass the same as over rest at downs, Shepherd said it was quite out of memory when it was ploughed Landlord said a century at least

Furrows 13 strides apart, almost 8 of them

all the furrows faded away at almost the same place

Very faint furrows much obliterated with cart tracts came down into valley from opposite side, bit did not quite correspond in position

[annotation by Darwin:] not done with clinometer by eye alone

[sketch: transverse section]

[annotation by Darwin:] Furrows & Crown ran down the Hill; Central is steeper in the part steeper; About here the [illeg] extremely level furrow ran where furrows & ridge Ended. This is not the note referred to in the note of Monday Jan 1 1872; Is there any stream?

Nearly 1 inch maybe deducted from reach reading from height of head of skewer (1/4) & natural inequalities

underneath mould it was mixed flints & chalk so that as I got higher it became more difficult to drive in skewer, at last it became impossible and I had to drive it in quite sideways

Section of slope through furrow

— Scale 1/4 inch to stride — upper figures numbers of strides

lower figures depth of furrow

General slope 8° to 10° taken with eye by means of semicircle when lying on chest.