On Several occasions the present writer would have found a list of play manuscripts dating from 1558 to 1700 a convenience while working in the field. These manuscripts, impressive in number and in the possibilities for study which they offer, have never been catalogued with the care which has been lavished upon play publications. The manuscripts listed in Appendix N of E. K. Chambers' Elizabethan Stage are limited to those of plays provedly composed before 1616; and the notes concerning manuscripts interspersed in W. C. Hazlitt's Manual for the Collector and Amateur of Old English Plays are incomplete and frequently vague. The list of manuscripts which follows has been compiled after a reëxamination of the catalogues of museums and university libraries, and application by mail to the curators of such collections as those at the Folger Shakespeare Library and the Huntington Library and Art Gallery. Exhaustiveness is not claimed; but the lists already existing are considerably supplemented, and in a number of instances it has been possible to supply the precise location of manuscripts which were known but unlocated by Chambers or which have changed ownership since the time of Hazlitt.