The privilege claimed by the Commons, both as to its origin and its principle, has been carefully examined by Hallam, who has pointed out that in its full exclusiveness it is not older than Charles II., since the Convention Parliament of 1660 "made several alterations in undoubted money-bills, to which the Commons did not object."[69] And, though his attachment to Whig principles might have inclined him to take their part in any dispute on the subject, he nevertheless thinks that they have strained both "precedent and constitutional analogy" in their assertion of this privilege, which is "an anomaly that can hardly rest on any other ground of defence than such a series of precedents as establish a constitutional usage." The usage which for two centuries was established in this case by the good-sense of both parties clearly was, that the Lords could never originate a money-bill, nor insert any clause in one increasing or even altering the burden laid by one on the people, but that they were within their right in absolutely rejecting one.

But such a right has a tendency to lapse through defect of exercise; and we shall hereafter see that "the disposition to make encroachments," which in this matter Hallam imputes to the Commons, has led them in the present reign to carry their pretensions to a height which at a former period had been practically ignored by the one House, and formally disclaimed by the other.
It may be remarked that Mr.Dunning's success in carrying his first resolution did in itself, to a certain extent, disprove the truth of that resolution, since, if the influence of the crown had been such as he represented it, it must have been sufficient to insure its rejection.
But that resolution, and a new statute, of which in a previous session he had been one of the principal promoters, are reckoned by Lord Stanhope as among the chief causes of the disgraceful riots of 1780.

In the summer of 1778 he had seconded and supported with great eloquence the repeal of some of the penal statutes against the Roman Catholics which had been passed in the reign of William III.

It was the first blow at that system of religious intolerance which for nearly a century had been one of the leading principles, as it had been also the chief disgrace, of the constitution; and it was passed with scarcely any opposition by both Houses.

As, however, the statute which it repealed had been enacted before the Scotch Union, the repeal did not extend to Scotland, and it was necessary, therefore, to bring in a separate measure for that kingdom.