, but coloured. An instance of this
is represented in Fig. 69 towards the middle part of the column, but
as I shall have shortly to enter at length into the colour
associations of the author, I will pass over this portion of them,
and will quote in preference from the letter of another correspondent.

Baron von Osten Sacken, of whom I have already spoken, writes:--

"The localisation of numerals, peculiar to certain persons, is
foreign to me. In my mind's eye the figures appear _in front_ of me,
within a limited space. My peculiarity, however, consists in the
fact that the numerals from 1 to 9 are differently coloured; (1)
black, (2) yellow, (3) pale brick red, (4) brown, (5) blackish gray,
(6) reddish brown, (7) green, (8) bluish, (9) reddish brown,
somewhat like 6. These colours appear very distinctly when I think
of these figures separately; in compound figures they become less
apparent. But the most remarkable manifestation of these colours
appears in my recollections of chronology. When I think of the
events of a given century they invariably appear to me on a
background coloured like the principal figure in the dates of that
century; thus events of the eighteenth century invariably appear to
me on a greenish ground, from the colour of the figure 7. This habit
clings to me most tenaciously, and the only hypothesis I can form
about its origin is the following:--My tutor, when I was ten to
twelve years old, taught me chronology by means of a diagram on
which the centuries were represented by squares, subdivided in 100
smaller squares; the squares representing centuries had _narrow
coloured borders_; it may be that in this way the recollection of
certain figures became associated with certain colours. I venture
this explanation without attaching too much importance to it, because
it seems to me that if it was true, my _direct_ recollection of those
coloured borders would have been stronger than it is; still, the
strong association of my chronology with colour seems to plead in
favour of that explanation."

Figs. 66, 67. These two are selected out of a large collection
of coloured Forms in which the months of the year are visualised.
They will illustrate the gorgeousness of the mental imagery of
some favoured persons. Of these Fig. 66 is by the wife of an able
London physician, and Fig. 67 is by Mrs. Kempe Welch, whose sister,
Miss Bevington, a well-known and thoughtful writer, also sees
coloured imagery in connect