Boyle was a maternal nephew of Albert Whiggs Easmon, a leading physician and surgeon in Freetown, and John Farrell Easmon, one-time Chief Medical Officer of the Gold Coast who coined the term "Blackwater fever".
Boyle attended the Wesleyan (Methodist) Boys' High School in Freetown, and attended Zion Methodist Church, Wilberforce Street, a Settler church founded by the early African-American founders of the Colony of Sierra Leone and the settlement of Freetown.
He was an ideological disciple of Edward Wilmot Blyden, a Caribbean pan-Africanist scholar who taught in Liberia and Sierra Leone.
Boyle obtained a scholarship and financial assistance to attend Howard University College of Medicine and qualified as a medical doctor.
Boyle died in Baltimore, Maryland, on 21 November 1936 and was survived by his wife Bertha and daughter Leone B., Son’s Blyden and Mayfield Jr.