How old are these plays?

Between 1848 and 1873, self-styled “theatrical publisher” Thomas Hailes Lacy published 100 volumes of Lacy's acting edition of plays, dramas, farces and extravagances, etc., etc., as performed at the various theatres, each containing fifteen titles. This proved to be a highly profitable venture, which Lacy passed on to his friend and former collaborator Samuel French shortly before his demise in 1974, and which continued to be published into the next century. Individual volumes in this editi...