"Do all photographers varnish their
negatives? I had supposed so till a few days ago, when I called on Mr
Tunny and found him - well not in the most amiable of moods.
He had taken to overhauling of his
earlier negatives, some of which are, or ought to be of considerable value;
but most of them are almost ruined by oxidation of the metallic deposit, or
by scratching, and many have suffered from both causes.
The fact seems to be that previous
to 1860, or thereabouts, Mr Tunny had, for some forgotten reason, left his
negatives unvarnished, the result being the above-mentioned partial, and in
some cases total, destruction of valuable property, and the consequent
half-application of sundry epithets so far from complimentary that I would
not advise anyone to try it on in the same way."
[BJP: 29 September 1876