In 1886 a large quarto volume was published entitled “A History of the American Theatre before the Revolution,” by George O. Seilhamer. There appeared to be no occasion for a special history of this particular period of twenty-nine years, that is from 1749 to the Revolution, as Dunlap’s history extended from 1752 to about 1817, and what was known at the time of Mr. Seilhamer’s publication respecting the theater in North America before 1752 had already been published in Ireland’s “History of the New York Stage,” and in the paper here reprinted, except one item to be referred to hereafter. There were some further corrections to be made to Dunlap’s history, but they were not very important or numerous, and some additional information to be added respecting theatrical performances in Maryland and Pennsylvania that was new and interesting. This was included in this special history, which, in addition to what had been previously published, was largely made up of the full casts, as they are called in theatrical parlance, of plays given at particular dates during the Colonial period; that is, the name of the performer of each part, taken from the small play-bills that are printed for the use of the audience. As it is the custom in theaters for the prompter to keep a file of these bills each season, and the habit of some persons to keep the play-bill of any performance they have seen, considerable collections of these small play-bills have been preserved, and exist in private collections or in institutions or clubs, of which Mr. Seilhamer has made copious use, and has also inserted in this volume long lists of the performances given at particular dates and tabulated statements of the leading parts of actors and actresses, and the statements of performances, culled from the Colonial newspapers, by all of which insertions the volume is augmented to the magnitude of a large quarto. Dunlap, while stating that play-bills and theatrical advertisements are of assistance, or, as he expressed it, “throw light” (that is, they may assist the historian in the construction of his narrative), evidently thought that this minute information, or detail, of this kind was not, save in exceptional instances, to be inserted bodily in a history, for he apologizes to his readers for inserting three full casts of plays that were performed in the years 1752, 53, and 54, in these words: “Particularity of this kind would be unnecessary in regard to events of more recent date and _out of place in a history of a theatre_, but in this early stage of the work before us, we think a play-bill a valuable source of information and gladly insert it,”[22] and in this respect we incline to the opinion of Dunlap.