She, indeed, practically sacrificed her life to her father.

It is one of the rarest and most striking instances of filial devotion known in the annals of science or literature, and is a noticeable contrast to the daughters of the blind Milton, whose domestic life was rendered unhappy by their undutifulness, as they were impatient of the restraint and labors his blindness had imposed upon them.
Besides this, the seventh volume is a voluminous scientific work, filled with very dry special details, making the labor of writing out from dictation, of corrections and preparation for the press, most wearisome and exhausting, to say nothing of the corrections of the proof-sheets, a task which probably fell to her--work enough to break down the health of a strong man.
It was a natural and becoming thing for the Assembly of Professors of the Museum, in view of the "malheureuse position de la famille," to vote to give her employment in the botanical laboratory in arranging and pasting the dried plants, with a salary of 1,000 francs.
Of the last illness of Lamarck, and the nature of the sickness to which he finally succumbed, there is no account.

It is probable that, enfeebled by the weakness of extreme old age, he gradually sank away without suffering from any acute disease.
The exact date of his death has been ascertained by Dr.Mondiere,[45] with the aid of M.Saint-Joanny, archiviste du Department de la Seine, who made special search for the record.

The "acte" states that December 28, 1829, Lamarck, then a widower, died in the Jardin du Roi, at the age of eighty-five years.
The obsequies, as stated in the _Moniteur Universel_ of Paris for December 23, 1829, were celebrated on the Sunday previous in the Church of Saint-Medard, his parish.

From the church the remains were borne to the cemetery of Montparnasse.