These two works, now reprinted for handy reference in a single volume, index over 40,000 references to surnames contained in the printed registers of English parishes during the years 1601 and 1602. While the two indexes themselves merely list the surname and the parish register(s) where it occurred in 1601 and 1602, and the location of the register at the time of original publication, researchers must realize that these reference are of considerable value inasmuch as the parish records to which they refer are nothing less than early 17th-century registers of baptisms, marriages, and burials. The potential importance of this combined work for American descendants of 17th-century English colonists, therefore, can scarcely be exaggerated. For a great many people, then, these references will tell from which parish in England an ancestor migrated, which parish records to examine, and what other branches of the family existed at that time.