circle but of three miles diameter, whose area is about seven square
miles, and the suburbs scarce as much more, in all about thirteen
square miles, whereas the built ground at London is about nine
square miles as aforesaid; which two sorts of proportions agree with
each other, and consequently old Rome seems but to have been half as
big again as the present London, which we offer to antiquaries.



THE THIRD ESSAY.



Proofs that the number of people in the 134 parishes of the London
bills of mortality, without reference to other cities, is about
696,000, viz. -

I know but three ways of finding the same.

1. By the houses, and families, and heads living in each.

2. By the number of burials in healthful times, and by the
proportion of those that live, to those that die.

3. By the number of those who die of the plague in pestilential
years, in proportion to those that escape.


The First Way.