But he died before he finished it, and ordered his manuscript to be destroyed.

We may well imagine how the quiet, stately genius of Racine would have conceived and ordered it; with the sincere passion, held under restraint by as sincere a dignity, which characterised his exalted style.
Balaustion treats it with an equal moral force, and also with that modern moral touch which Racine would have given it; which, while it removed the subject at certain points from the Greek morality, would yet have exalted it into a more spiritual world than even the best of the Greeks conceived.

The commentary of Balaustion is her own treatment of the subject.

It professes to explain Euripides: it is in reality a fresh conception of the characters and their motives, especially of the character of Herakles.

Her view of the character of Alkestis, especially in her death, is not, I think, the view which Euripides took.