History. Pill Hill became part of Brookline in 1844, when it was annexed from Boston. Noted abolitionist Samuel Philbrick lived in Brookline at 182 Walnut Street during the mid-19th century. His home eventually became a stop for the Underground Railroad.. Like other Pill Hills in the United States, Pill Hill in Brookline was nicknamed for the large numbers of doctors in the neighborhood. Pill Identifier results for "H 31". Search by imprint, shape, color or drug name.