Undeterred by the offence which these works gave to his ecclesiastical superiors, he published in 1858 the Einleitung in die Philosophie and Grundriss der Metaphysik, in which he assailed the doctrine of Thomas Aquinas, that philosophy was the handmaid of theology.
It is plain that Blyth saw, and perhaps he was the first to see it, that geographical distribution was not unimportant in suggesting the affinities and differences of natural groups (pp. 258, 259); and, undeterred by the precepts and practice of the hitherto dominant English school of Ornithologists, he declared that " anatomy, when aided by every character which the manner of propagation, the progressive changes, and other physiological data supply, is the only sure basis of classification."
Undeterred by the news of heavy attacks on his rear from Tirol and from Bohemia, Napoleon hurried all available troops to the bridges, and by daybreak on the 21st, 40,000 men were collected on the Marchfeld, the broad open plain of the left bank, which was also to be the scene of the battle of Wagram.
Undeterred by this inhospitable reception, Parkman took up at the beginning his great work on France and England in the New World, to which the book just mentioned was in reality the sequel.
Undeterred by rumours of a plot against his own life, Amedeo entered Madrid alone, riding at some distance from his suite to the church where Marshal Prim's body lay in state.
Still undeterred, she entered into a conspiracy to depose her brother after his accession; and when her husband refused to join in the enterprise, she exclaimed that "nature had mistaken their sexes, for he ought to have been the woman."
But the society pursued its objects, undeterred by sarcasm.
Undeterred by this, the chapter, on the death of Steenoven, elected as archbishop Cornelis Jan Burchman, who was consecrated by the bishop of Babylon on the 30th of September 1725.
He was a man much in advance of his age - shrewd, enterprising, and undeterred by difficulty - a kind of Peter the Great of his time.