The Rose, p. 244 (1892)
By Henry Brooks Ellwanger
Charles Darwin, free. H.R. – Laxton, 1879. (Sent out by G. Paul.) Raised from Madame Julie Daran. Brownish-crimson, with a shade of violet, very beautiful and distinct; mildews easily.

I think Laxton's statement means that Mme. Julie Daran was the seed parent. Pollen parent unknown.

Gardener’s Monthly (November, 1880) pp. 322-325
CROSS-FERTILIZING AND RAISING ROSES FROM SEED IN ENGLAND
BY T. T. LAXTON, BEDFORD, ENG.
In 1869 I raised H.P.'s Mrs. Laxton, probably from Mme. Victor Verdier, Charles Darwin from Madame Julie Daran, this being the dark H.P., Rose of Bourbon blood par excellence, of which I sowed the seed in that year, and Emily Laxton perhaps from Abet Grande.