Peacock says that it was between April 18 and June 8.) She was then a girl of sixteen, "fair and fair-haired, pale indeed, and with a piercing look," to quote Hogg's description of her, as she first appeared before him on the 8th or 9th of June, 1814.

With her freedom from prejudice, her tense and high-wrought sensibility, her acute intellect, enthusiasm for ideas, and vivid imagination, Mary Godwin was naturally a fitter companion for Shelley than the good Harriet, however beautiful.
That Shelley early in 1814 had no intention of leaving his wife, is probable; for he was re-married to her on the 24th of March, eight days after his impassioned letter to Hogg, in St.George's, Hanover Square.
Harriet was pregnant, and this ratification of the Scotch marriage was no doubt intended to place the legitimacy of a possible heir beyond all question.

Yet it seems, if we may found conjecture on "Stanzas, April, 1814," that in the very month after this new ceremony Shelley found the difficulties of his wedded life insuperable, and that he was already making up his mind to part from Harriet.

About the middle of June the separation actually occurred--not by mutual consent, so far as any published documents throw light on the matter, but rather by Shelley's sudden abandonment of his wife and child.

(Leigh Hunt, Autobiography page 236, and Medwin, however, both assert that it was by mutual consent.