If at first in the 18th century, and in the earlier 19th, the discoveries in this branch of medical knowledge had a certain isolation, due perhaps to the prepossessions of the school of Sydenham, they soon became the property of the physician, and were brought into co-ordination with the clinical phenomena of disease.
Trajan's notions of civil government were, like those of the duke of Wellington, strongly tinged with military prepossessions.
But besides this, as Leslie has pointed out, the influence of Montesquieu tended to counterbalance the theoretic prepossessions produced by the doctrine of the jus naturae.
It affords a curious example of the effect of doctrinal prepossessions in obscuring the results of historical inquiry.
Macaulay's bluff and strenuous character, his rhetorical style, his unphilosophical conception of history, were entirely out of harmony with Morison's prepossessions.