  Charles Lewis Brook, MA, FRAS, FRMetS (1855 - 1939) served as Director of the
BAA Variable Star Section from 1910 to 1921. During this time he was not merely
interested in collecting the observations of the members (to which he also
contributed), but he also spent considerable amounts of time analysing the data
and preparing numerous publications on the findings. This paper discusses
Brook's life and work, with a particular focus on his contribution to variable
star astronomy.
