As the foregoing Treatise is written and published with an intention
to communicate a discovery that will prove of infinite advantage to
the loveliest of arts, in all its branches; the author, conscious
of wanting the necessary qualifications of a writer in a language
not natural to him, hopes for indulgence, for all the inaccuracies
and improprieties of expression he may and must have fallen into: as
to facts, he begs leave to assure the public, that nothing has been
advanced but what is strictly true.
If any artist or others should in practising be at a loss or stand for
any thing, the author shall always be willing and ready to give them
farther light on any occasion.
The treatise on Practical Painting in general, which was to have been
published together with this, as has been intimated to the public in
an advertisement of the third of January, will be published as soon
as possible; the author being engaged in a work of a very extensive
nature, had not time to bring it in perfect order himself; a gentleman
and friend of his has been so kind as to undertake the finishing and
correcting of it; it will soon be ready for the press.