t are not all sets of figures similarly impressive coincidences
to the trained eye, and the _active_, _thinking_ and _assimilative_
mind?

No reader of English history has failed to notice the three sixes in the
date of the Great Fire in London, _viz._, 1666. The "three sixes" are
generally resorted to as a signal for fire companies to turn out in full
force; yet such a coincidence of figures in a distant date makes a
slight impression compared to the vividness of events that happened in
the year of our birth, the year of graduation from school, the year of
marriage, and the year of the death of relatives, &c., &c. Keep a small
blank book for such entries, not to help remember the dates or facts,
but to have them together so as to rapidly deal with them, to classify
them and otherwise study them under the eye. You will soon be astonished
at the accumulation.

The population of New Zealand, exclusive of natives, is 672,265.
Bringing the first two figures into relation with the last two we have
67 and 65--a difference of 2 only. The two groups of 672 and 265 have
the figure 2 at the end of the first group, and another 2 at the
beginning of the second group. These two twos are in sequence (Con.),
and each of them expresses the difference between 67 and 65. _Thought_
about in this way, or in any other, the series becomes fixed in mind,
and will be hard to forget.

The population of Sydney is 386,400. Here are two groups of three
figures each. The first two figures of the first group are 38, and the
first two figures of the second group are 40--a difference of 2. Two
taken from 8 leaves 6, or the third figure of the first group, and 2
added to the first figure of the second group makes 6. The 40 ends with
a cypher, and it is a case of Syn. In. that the last figure of the
second group or the third figure of it should likewise be a cypher.
Besides, those who know anything at all about the population of Sydney
must know that it is vastly more than 38,640, and hence that there must
be another cypher after 40, making the total of 386,400.

The population of Melbourne is 490,912. Here we have 4 at the beginning
and half of 4 or 2 at the end of the six figures. The four interior
figures, viz., 9091 is a clear case of Con.--or 90 and 91. Then again 91
ending with 1, the next figure is 2--a case of sequence or Con. But
490,912 is the population of the city of Melbourne with its suburbs. The
"city" itself contains only 73,361 inha