For his edition, Mr. C. F. H. Johnston also collated or had collated 22,509 Add. mss., Xth c., in the British Museum; codd. Misc. xxxvii., XIth c., in the Bodleian Library at Oxford; Cod. Theol. 142, XIIth c., in the Imperial Library at Vienna; Cod. Theol. 18, XIVth c., also at Vienna; Cod. xxiii, XIth c., in the Library of the Holy Synod at Moscow; 500 (Reg. 1824, 3) G, XIth c., at Paris; Cod. lviii., Xth c., at St. Mark’s, Venice; Cod. lxvi., XIIth c., also at St. Mark’s, Venice; Codd. Regin. Suaecor. 35, XIVth c., in the Vatican at Rome.