By the way, you really must not associate me with Tyndall and talk about our theory.  My sole merit in the matter (and for that I do take some credit) is to have set him at work at it, for the only suggestion I made, namely that the veined structure was analogous to his artificial cleavage phenomena, has turned out to be quite wrong.

Tyndall fairly made me put my name to that paper, and would have had it first if I would have let him, but if people go on ascribing to me any share in his admirable work I shall have to make a public protest.  All I am content to share is the row, if there is to be one.

[The following letters to Hooker and Tyndall touch upon his Swiss trips of 1856 and 1857:—­]

Berne, September 3, 1856.

I send you a line hence, having forgotten to write from Interlaken, whence we departed this morning.

The Weissthor expedition was the most successful thing you can imagine.  We reached the Riffelberg in 11 1/2 hours, the first six being the hardest work I ever had in my life in the climbing way, and the last five carrying us through the most glorious sight I ever witnessed.  During the latter part of the day there was not a cloud on the whole Monte Rosa range, so you may imagine what the Matterhorn and the rest of them looked like from the wide plain of neve just below the Weissthor.  It was quite a new sensation, and I would not have missed it for any amount; and besides this I had an opportunity of examining the neve at a very great height.  A regularly stratified section, several hundred feet high, was exposed on the Cima di Jazi, and I was convinced that the Weissthor would be a capital spot for making observations on the neve and on other correlative matters.  There are no difficulties in the way of getting up to it from the Zermatt side, tough job as it is from Macugnaga, and we might readily rig a tent under shelter of the ridge.  That would lick old Saussure into fits.  All the Zermatt guides put the S. Theodul pass far beneath the Weissthor in point of difficulty; and you may tell Mrs. Hooker that they think the S. Theodul easier than the Monte Moro.  The best of the joke was that I lost my way in coming down the Riffelberg to Zermatt the same evening, so that altogether I had a long day of it.  The next day I walked from Zermatt to Visp (recovering Baedeker by the way), but my shoes were so knocked to pieces that I got a blister on my heel.  Next day Voiture to Susten, and then over Gemmi to Kandersteg, and on Thursday my foot was so queer I was glad to get a retour to Interlaken.  I found most interesting and complete evidences of old moraine deposits all the way down the Leuk valley into the Rhine valley, and I believe those little hills beyond Susten are old terminal moraines too.  On the other side I followed moraines down to Frutigen, and great masses of glacial gravel with boulders, nearly to the Lake of Thum.

My wife is better, but anything but strong.