They fought with more pertinacity than bulldogs.
In the end the pertinacity of John triumphed.
This pertinacity engendered a belief in France that Italy was about to undertake in Tunisia a more aggressive policy than necessary for the protection of her commercial interests.
This method, which in process of time was dignified by the title of a Physiological Arrangement, was insisted upon with more or less pertinacity by the author throughout a long series of publications, some of them separate books, some of them contributed to the memoirs issued by many scientific bodies of various European countries, ceasing only at his death, which in July 1857 found him occupied upon a Conspectus, Generum Avium, that in consequence remains unfinished.
With unflinching pertinacity he struggled till he had completed a likeness, of the king upon which he `was engaged at the time, and then started for his beloved Italy, leaving behind him a series of fifty royal portraits to be completed by his assistant Reinagle.
Under such conditions the deeply-rooted nature of the blood-sucking instinct is most remarkable; for insects whose ancestors for many generations may not have tasted blood will seek for it with the utmost keenness and pertinacity so soon as an opportunity presents itself.
In one point he seems to have taken a false step; with a warmth and pertinacity worthy of a better cause he maintained the identity of Caesar's Alesia with Alaise (Doubs), and he died without becoming a convert to the opinion, now universally accepted, that Alise Sainte-Reine (Cote d'or) is the place where Vercingetorix capitulated.
On the 21st of May, with extraordinary pertinacity, he sent Meade and Burnside once more against the inner flank of the Army of northern Virginia.
Extreme as were his principles, his pertinacity in adhering to them and his independence of expression were quite as extreme.
Enghien's pertinacity had not achieved a decision with the sword, but Mercy had been so severely punished that he was unable to interfere with his opponent's new plan of campaign.
This ignorance of the very nature of science leads to under-estimation of the elemental force which science possesses; for only thus can we explain the pertinacity with which Ultramontanism, even at the present day, strives to subject her work to its own censorship and control.