And Johnson, well arm'd like a hero of yore,
Has beat forty French[883], and will beat forty more!'

[Page 301: Zachariah Williams. AEtat 46.]

Johnson this year gave at once a proof of his benevolence, quickness of
apprehension, and admirable art of composition, in the assistance which
he gave to Mr. Zachariah Williams, father of the blind lady whom he had
humanely received under his roof. Mr. Williams had followed the
profession of physick in Wales; but having a very strong propensity to
the study of natural philosophy, had made many ingenious advances
towards a discovery of the longitude, and repaired to London in hopes of
obtaining the great parliamentary reward[884]. He failed of success; but
Johnson having made himself master of his principles and experiments,
wrote for him a pamphlet, published in quarto, with the following title:
_An Account of an Attempt to ascertain the Longitude at Sea, by an exact
Theory of the Variation of the Magnetical Needle; with a Table of the
Variations at the most remarkable Cities in Europe, from the year 1660
to 1680_.[Dagger] To diffuse it more extensively, it was accompanied
with an Italian translation on the opposite page, which it is supposed
was the work of Signor Baretti[885], an Italian of considerable
literature, who having come to England a few years before, had been
employed in the capacity both of a language-master and an authour, and
formed an intimacy with Dr. Johnson. This pamphlet Johnson presented to
the Bodleian Library[886]. On a blank leaf of it is pasted a paragraph cut
out of a news-paper, containing an account of the death and character of
Williams, plainly written by Johnson[887].

[Page 302: Joseph Baretti. A.D. 1755.]