George Chalmers 
Supplemental Apology for Believers in Shakespeare Papers [PDF ebook] 
Volume 26

First published in 1971. This is Volume 26 in the Eighteenth Century Shakespeare series. From the preface: At the time of the appearance of George Chalmers Apology (1797) it was rumoured that Malone intended a full reply; but whether tired of the controversy, unable to make enough capital of the defects in the Apology, or simply discreet, no such answer forthcame from the author of ‘An Inquiry’. ‘A Supplemental Apology’ has little if anything to add to the Ireland controversy; it is instead an extension of the more general methodological principles set out in An Apology, carrying forth the investigation into miscellaneous new areas of antiquarian research