It appears from “Watson’s Annals of Philadelphia” that there were theatrical performances in Philadelphia in January, 1749, seven months before this performance of “Cato” mentioned in Smith’s journal, and Dunlap also refers to theatrical performances there in 1749; and Watson and Dunlap were of opinion that these were performances by amateurs, for which Seilhamer takes Dunlap to account for, as he calls it, “a snap judgment” and “asserting what he knew nothing about”; “who,” he proceeds to say, “had made up his mind that the drama in America should begin with the Hallam Company, and so contemptuously ignored all previous theatrical efforts”; whilst he, Seilhamer, on the contrary was of the opinion that this performance of “Cato,” in August, 1749, was by Kean & Murray’s Company, who, it is known, came from Philadelphia to New York a year and a half afterwards; which may have been the fact, but there is no certainty about it, and for all that appears to the contrary, Dunlap and Watson may have been right; but Seilhamer evidently determined to dethrone Dunlap, and he therefore not only assumed this, but went much further, by stating that it was “certain” that Thomas Kean was the first actor to attempt _Richard III._ on the American stage. As Colley Cibber’s alteration of “Richard III.” was produced at Drury Lane in 1700, more than half a century before Thomas Kean played the character in New York, and as Cibber’s “Richard III.” was from the beginning and for more than a century afterwards one of the most popular plays that was during that period produced upon the English stage, it is as likely to have been played at Williamsburg or Charlestown or in New York in 1733 as any other; a period when we know that they had theaters at these places, but have very little information as to what plays were performed in them. And in both these erroneous assertions, that is, that the history of the American theater began in 1749, and that Kean was the first to play _Richard III._ in the Colonies, Seilhamer appears to have been unconscious that he was doing the very thing for which he so severely censured Dunlap, that is, giving a “snap judgment by asserting what he knew nothing about.”