the
false doctrines and heresies which he overthrew." _Calendar of the
Anglican Church Illustrated_: London, 1851, p. 37.

In Didron's splendid work (the _Iconographie_) we have several references
to ancient representations of our blessed Lord treading the dragon under
foot; and sometimes the lion, the asp, and the basilisk are added. (See Ps.
xci. 13.)

_The Conception_ is usually represented in Christian art by a figure of
Mary setting her foot, as second Eve, on the head of the prostrate serpent
(in allusion to Gen. iii. 15.), and thus we find it in Callot's _Images_.

"Not seldom, in a series of subjects from the Old Testament, the
pendant to Eve holding the apple is Mary crushing the head of the
fiend: and thus the bane and antidote are both before us." (See Mrs.
Jameson's _Legends of the Madonna._)

EIRIONNACH.

[Footnote 5: The title of this curious book is, _Geschichte der Mission der
evangelischen Brueder unter den Indianern in Nordamerika_, durch Georg H.
Loskiel: Barby, 1789, 8vo., pp. 783. Latrobe's translation of this book was
published Lond. 1794.]

[Footnote 6: This reminds one of the notion respecting

"The scorpion girt with fire,"

immortalised by Lord Byron's famous simile.]

[Footnote 7: _Eighteen Books of the Secrets of Art and Nature; being the
Summe and Substance of Naturall Philosophy methodically digested_: London,
1661.]

[Footnote 8: In O'Brien's work on _The Round Towers of Ireland_, London,
1834, may be found much curious matter on this subject; and a good deal of
light is thrown on the horrors of Serpent or Boodhist worship. It is,
however, a wild and irreverent book, and by no means to be recommended to
the general reader, independently of the nature of its details. Mr. Payne
Knight's book is too well known to need mention here.]

* * * * *

PHOTOGRAPHIC CORRESPONDENCE.

_Early Notice of the Camera Obscura._--I send you an early notice of the
camera obscura, which is to be found in vol. vi. of the _Nouvelles de la
Republique des Lettres_ for September, 1686, p. 1016. It is taken from a
letter of Mons. Laurenti, medecin, of Boulogne, "Sur l'erection des especes
dans une chambre optique."

"C'est ainsi qu'on nomme one chambre exactement fermee partout, si ce
n'est dans un endroit par ou on laisse entrer la lumiere, afin de voir
peints, et situes a rebours, sur un morceau de papier blanc, les objets
de