Birds, flight of, [4; the earliest ], [31; development of ], [32]

Bison, [56]

Black Death, the, [433]

Black Sea, [71], [94-95], [108], [129], [200]

Blood sacrifice, [167], [186], [212] (See also Sacrifice)

Boats, [91], [136]

Boer republic, [187]

Boers, [398]

Bohemia, [236], [306]

Bohemians, [304-05], [326]