Accidentals
The interpretation of accidentals poses few problems in Byrd's printed sources. The following editorial practice has been adopted:
Accidentals in the source are indicated by normal-sized symbols. These are not repeated within the bar in which they occur. Unless clearly erroneous (and so noted in the editorial commentary), all the printer's accidentals are included, either in the music or in editorial notes.
Editorial accidentals are indicated by small symbols before the note, repeated as necessary within a single bar. These are provided to correct (what seem to the editor) obvious omissions, to avoid severe and uncharacteristic harmonic clashes and to indicate preferred readings from manuscript sources. They are also used in editions from Byrd's earlier publications (1575-91) for notes in octaves other than those affected by the key-signature, where no accidentals occur in the source, since it appears that, in the 16th century, key-signatures applied only to the pitches at which they were placed. Later publications (1605-11) appear generally to adopt the modern practice, so these editorial accidentals are not employed here.
Cautionary accidentals are indicated by full-sized bracketed symbols. These are used:
For what is hoped will be the convenience of performers, where a different accidental has been recently employed;
Where, in accordance with 16th-17th century practice, a previous accidental would not apply, such as where repeated notes are separated by a rest or line-break.
Editorial or cautionary accidentals are not employed where the practice of the time seems to assume the persistence of a previous accidental: for repeated notes where there is no harmonic change and in cadential figures.
A particular textual problem needs specific mention: the D sharps leading to "augmented 6th" harmonies in the motets Tristitia et anxietas (II.102.1), Ne irascaris Domine (I.96.1) and Domine exaudi orationem meam (III.34.1, I.94.1). Modern critical opinion is against the acceptance of these D sharps, despite their appearance in the printed sources, on the grounds that they are stylistically inconsistent and do not appear in manuscript sources. However, the following points could equally be made in favour of their acceptance:
Incorrect accidentals are extremely rare in the two books of Cantiones sacrae, and tend elsewhere simply to be misplaced from adjacent notes;
The printed editions are otherwise incomparably more reliable than manuscript sources;
The printed editions incorporate numerous corrections and improvements to earlier manuscript versions;
The argument from stylistic consistency seems to deny Byrd the opportunity to make any harmonic experiments whatever.
Performers are of course at liberty to retain or omit these accidentals. An admirably balanced and informed discussion may be found in Watkins Shaw's article A Textual Problem in Byrd: A Purely Accidental Matter (Musical Times, Vol.102, No.1418 (Apr, 1961), pp.230-232), in which the writer's conclusion is against their acceptance.
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