"The deserted and utterly extinct city of London was under his feet."

Jefferies' book might have been an inspiration for the 'Statue of Liberty' moment in the original 1968 Planet of the Apes.

Felix later stumbles upon the upper part of Nelson's Column: 'He looked around, supposing that he might see the gleaming head and shoulders of the half-buried giant, of which he recollected he had been told. The giant was punished for some crime by being buried to the chest in the earth; fire incessantly consumed his head and played about it, yet it was not destroyed.' (p206)

This could have been taken from Shelley's poem, 'Ozymandias':

I met a traveller from an antique land
Who said: Two vast and trunkless legs of stone
Stand in the desert. Near them on the sand,
Half sunk, a shattered visage lies...

One can hear ringing in the air, the chilling inscription:

Look on my works, ye mighty, and despair!