Garner's English Usage, 2016 edition, page 191: > Erroneous Use of is comprised of: > The phrase is comprised of is increasingly common but has long been cons

Garner's English Usage, 2016 edition, page 191: > Erroneous Use of is comprised of: > The phrase is comprised of is increasingly common but has long been considered poor usage. It was not a frequent collocation until about 1950. Replace it with some other, more accurate phrase -- e.g. ... > "Moreover, the crowd in the mysterious room was comprised of [read comprised or was comprised of] adults, and Harry knew there were not nearly that many teachers at Hogwarts" J.K Rowling ...