Among the important collections of memorabilia concerning eighteenth-century London playhouses is that known as The Ms. Diaries of the Drury Lane Theatre, thirteen manuscript notebooks or theatrical calendars of quarto size among the holdings of The Folger Shakespeare Library, Washington, D.C. While there is a gap of two seasons, 1760–1762, and another of four seasons, 1764–1768, these documents are valued for their chronological record of theatrical seasons at the Theatre Royal, Drury Lane, throughout the management of David Garrick and his partner James Lacy, 1747–1776. Each night's reckoning is set down with the plays and entertainments produced, the box office receipts in round numbers, the numerical position of the performance in the particular season, and very often the prompter's notations concerning anything unusual about production, performers, the temper of the audience, or merely “the way things went” on a particular evening. Together with Course of Plays, 1740–1742, a similar calendar of the 1740–1741 season at Covent Garden Theatre and the 1741–1742 season at Drury Lane attributed to Richard Cross, these diaries have become known popularly as The Cross-Hopkins Diaries, after the two Drury Lane prompters, Richard Cross and William Hopkins, acknowledged compilers of the greater part of the series.