Dear Sir

D^r. Burdon Sanderson informs me that you are at present engaged with some experiments on the digestibility of chondrin & chlorophyll by Dionea.¹ I have no reference at hand regarding the effect of the ordinary digestive fluids on chlorophyll & those on the digestibility of chondrin are not so accurate as I could wish. I shall be most happy to test the digestibility of both substances if you will let me know the form in which you have employed them so that I may use the same. I have digestive fluids & apparatus ready so that it will give me no trouble whatever— I was much interested lately by a photograph taken from the painting of the holy Mary of Egypt by Ribeia in the Dresden gallery.² The painting strikes me at once by the decided squint which the painter has depicted. This excites the astonishment of every one as this extraordinary blemish does not detract from but rather adds to the beauty of the picture. On covering the sides of the face in the photograph alternately I observed that the expression of the two was quite different, that of the one being ecstatic & joyful that of the other repentant & sorrowful. On seeing this it occurred to me that when the painter wants to depict a very complex expression the two sides of the face will be almost necessarily different. The eye will express one, the mouth another or possibly more but if the whole face is to express more than the mouth & eye together, the two eyes & the two sides must differ. I have looked at one or two other photographs & noticed the same thing to a less extent— It is necessary to have very good photographs & the best are those taken from drawings by artists in Dresden. Very probably you have observed the same thing but I mention this because I do not remember any mention of it in your book on expression. I know that correspondence of any sort takes up much of any ones time and I do not wish to encroach upon yours which is so valuable but if you will merely write the names of the forms of chondrin & chlorophyll you use I will be glad to let you know their digestibility

Yours very truly | T Lauder Brunton