Towards the close of the year 1837 he returned to France, and on the 21st of December married Mlle Agathe Delamalle, daughter of the government prosecuting attorney at the court of Angers.
He had contracted a second marriage in 1869 with Mlle Autard de Bragard, daughter of a former magistrate of Mauritius; and eleven out of twelve children of this marriage survived him.
At the time of her death in January 1665 Mlle de La Fayette was superior of a convent of her order which she had founded at Chaillot.
Thus at one step Pasteur gained a place of honour among the chemists of the day, and was immediately appointed professor of chemistry at the Faculte of Science at Strasburg, where he soon afterwards married Mlle Laurent, who proved herself to be a true and noble helpmeet.
In Paris he frequented the salons, especially those of Mme Graffigny - whose niece, Mlle de Ligniville ("Minette"), afterwards Mme Helvetius and his lifelong friend, he is supposed at one time to have wished to marry - Mme Geoffrin, Mme du Deffand, Mlle de Lespinasse and the duchesse d'Enville.