Bernard Barham Woodward,
Dictionary of National Biography…
(1893)
“ Shortly before he died, MacGillivray had completed what was the great work of his life, 'A History of British Birds.' This had been begun before 1837, when the first volume was issued, and extended to five volumes in 8vo, the last two being completed in the intervals of illness. The style is singularly clear, while the care devoted to anatomical details and to the graphic descriptions of the haunts and habits of the birds gives it permanent scientific value. MacGillivray, for the first time in the history of the science, based his classification of birds on their anatomical structure. ”
