-----------------------------------
London, | | |
Metropolitan | | |
Districts | 33,155 | .55 | .73
Urban Districts| 22,346 | .71 | .95
Rural Districts| 13,391 | .79 | 1.05
----------------------------------------------------
Total | 68,892 | .64 | .85[A]
----------------------------------------------------
[A] Cf. Mulhall, .75 per cent, _supra_, p. 18.

In regard to the frequency of marriage between kin more distant than
first cousins figures are still more difficult to obtain. The
distribution of 514 cases of consanguineous marriage from genealogies
was as follows:

TABLE VII.
---------------------------------------------------------------------
| First | 1-1/2 |Second | 2-1/2 | Third |Distant|
|cousins|cousins|cousins|cousins|cousins|cousins|Total
---------------------------------------------------------------------
Same-name | 70 | 24 | 49 | 19 | 20 | 26 | 208
Different-name| 96 | 30 | 58 | 22 | 37 | 62 | 305
---------------------------------------------------------------------
Total | 166 | 54 | 107 | 41 | 57 | 88 | 513
---------------------------------------------------------------------

Obviously this cannot be taken as typical of the actual distribution
of consanguineous marriages, since the more distant the degree, the
more difficult it is to determine the relationship. However it is very
evident that the coefficient of attraction is at its maximum between
first cousins, and probably there are actually more marriages between
first cousins than between those of any other recognized degree of
consanguinity. But the two degrees of 1-1/2 cousins and second cousins
taken together probably number more intermarriages than first cousins
alone. Allowing four children to a family, three of whom marry and
have families, the actual number of cousins a person would have on
each degree would be: First, 16; 1-1/2, 80; Second, 96; 2-1/2, 480;
Third, 576; Fourth, 3,456. The matter is usually complicated by double
relationships, but it will readily be seen that the consanguineal
attraction would hardly be perceptible beyond the degree of third
cousins.[27]

[Footnote 27: See note, _infra_, p. 29.]

Omitting, as in the discussion on page 24, those genealogies in which
only the male line is given we