800,000, the supposed number of Holland.

Furthermore, I say that upon former searches into the peopling of
the world, I never found that in any country--not in China itself--
there was more than one man to every English acre of land: many
territories passing for well-peopled where there is but one man for
ten such acres. I found by measuring Holland and West Frisia (alias
North Holland) upon the best maps, that it contained but as many
such acres as London doth of people, viz., about 696,000 acres. I
therefore venture to pronounce (till better informed) that the
people of London are as many as those of Holland, or at least above
two-thirds of the same, which is enough to disable the objection
above mentioned; nor is there any need to strain up London from
696,000 to 800,000, though competent reasons have been given to that
purpose, and though the author of the excellent map of London, set
forth A.D. 1682, reckoned the people thereof (as by the said map
appears) to be 1,200,000, even when he thought the houses of the
same to be but 85,000.

The worthy person who makes this objection in the same letter also
saith -

1. That the province of Holland hath as many people as the other
six united provinces together, and as the whole kingdom of England,
and double to the city of Paris and its suburbs; that is to say,
2,000,000 souls. 2. He says that in London and Amsterdam, and
other trading cities, there are ten heads to every family, and that
in Amsterdam there are not 22,000 families. 3. He excepteth
against the register alleged by Monsieur Auzout, which makes 23,223
houses and above 80,000 families to be in Paris; as also against the