[7] Under the pseudonym "Civis Africanus", he contributed "dozens of Pan-Africanist-oriented poems" to the Negro World, and after the publication was officially banned in West Africa, sent copies to the editor of the Gold Coast Leader, J. E. Casely Hayford.
[11][12] Alongside being the leading figure in the Dominica UNIA,[13] Casimir was active at a local community level, elected to serve as a Roseau town councillor, and his working life additionally encompassed being a bookseller and bookbinder.
[5] In his literary career he contributed militant poetry to The Dominica Star, the newspaper edited by Phyllis Shand Allfrey, as well as writing articles for local, regional and US publications, including the Pittsburgh Courier,[5] for which he was a correspondent from 1950 to 1952.
[17][18][19] According to Lennox Honychurch, "In Black Man Listen, Kathy MacLean has not only done her grandfather proud, but she has provided Caribbean people with a new window onto Marcus Garvey's work in the region and among the African diaspora around the world.
"[20] In another review of the book, Gabriel Christian wrote: "MacLean masterfully juxtaposes historical accounts with present-day reflections, reinforcing the timelessness of Casimir’s mission for dignity and unity.