The following is a list of his scientific papers on this subject, which are mostly incorporated in the present work:—
(1) Letters on the Ornithology of Buenos Ayres. P. Z. S. 1869, p. 432; 1870, pp. 87, 112, 158, 332, 545, 671, 748, 798; 1871, pp. 4, 258, 326.
(2) On the Birds of the Rio Negro of Patagonia. With Notes by P. L. Sclater, M.A., Ph.D., F.R.S., &c. P. Z. S. 1872, p. 534.
(3) On the Habits of the Swallows of the Genus Progne met with in the Argentine Republic. With Notes by P. L. Sclater, M.A., Ph.D., F.R.S., &c. P. Z. S. 1872, p. 605.
(4) Further Observations on the Swallows of Buenos Ayres. P. Z. S. 1872, p. 844.
(5) Notes on the Habits of the Churinche (Pyrocephalus rubineus). P. Z. S. 1872, p. 808.
(6) Notes on the Habits of the Pipit of the Argentine Republic. P. Z. S. 1873, p. 771.
(7) Notes on the Procreant Instincts of the three Species of Molothrus found in Buenos Ayres. P. Z. S. 1874, p. 153.
(8) On the Habits of the Burrowing-Owl (Pholeoptynx cunicularia). P. Z. S. 1874, p. 308.
(9) On the Herons of the Argentine Republic, with a Notice of a curious Instinct of Ardetta involucris. P. Z. S. 1875, p. 623.