I'm pretty sure the Anguttara (which I set to download first) is:
The Book of the Gradual Sayings, 5 volumes: Vol. I (1932, 1989, 1995), Vol. II (1933, 1992, 1995), tr. F.L. Woodward; Vol. III (1934, 1988, 1995), Vol. IV (1935, 1989, 1995), tr. E.M. Hare; Vol. V (1936, 1994), tr. F.L. Woodward, Pali Text Society, Oxford, England
Translation of A.nguttara-nikaaya.
So this torrent is a collection of the entire PTS Sutta Pitaka, it would seem - mostly. Anguttara 4 was missing, alas, contrary to what I first thought.