Boris Bykov (Boris Yakovlevich Bukov). Member of the Communist Party since 1919. Bykov was head of the underground apparatus with which Whittaker Chambers and Alger Hiss were connected.
wore a hat, in part to cover his hair, which was memorably red. He gave
in fact an overall impression of redness. His lashes were
ginger-colored, his eyes an odd red-brown, and his complexion was
ruddy.... He also was subject to violent mood swings, switching from
ferocious tantrums to grating fits of false jollity. And he was habitually distrustful. " http://spartacus-educational.com/Boris_Bykov.htm