The pseudonymous author of a series of letters that appeared in the Public Advertiser, Jan. 1769–Jan. 1772, attacking, with bitter scorn and invective, among others, the duke of Grafton, Lord Mansfield, and George III himself. Junius also takes an active part on behalf of Wilkes. Though personal invective is the cheap weapon of Junius, his political arguments, written from the Whig standpoint, are shrewd and lucidly expressed, and he shows himself well read in Hobbes and Locke. The identity of Junius has never been definitely established. He is now generally thought to have been Sir Philip Francis.