1st ed. (1958) was single volume edited by William Theodore de Bary and others (later impressions being in two volumes);
2nd ed. (1988) was two volume set: v. 1. From the beginning to 1800 / edited and revised by Ainslie T. Embree -- v. 2. Modern India and Pakistan / edited and revised by Stephen Hay.
This entry is for the single-volume edition only.