REPORT ON THE MIGRATION OF BIRDS IN THE SPRING AND AUTUMN OF 1880.
Reading edition
"I am fixing correspondents in every corner of these northern regions, like so many pickets and outposts; so that scarcely a Wren or a Tit shall be able to pass from York to Canada but I shall get intelligence of it."—Alexander Wilson, in 1808. (Vide Constable's Edition, 1831, p. xlix.)