This second volume in the third series of the Great Migration Study Project contains new research to uncover the details of 121 immigrants with surnames beginning with Bi to By who came to New England between 1636 and 1638 and appear in the Great Migration Directory. Sketches include details on origin, previous residences, migration, first residence, removes, return trips, occupation, church membership, freeman status, education, offices held, estate, birth, death, marriage, children, associations, and an expanded comments section.