His 1891 essay "The Quintessence of Ibsenism" promoted the realistic dramas of a fellow playwright
[DOC] [TLE] Full text of "George Bernard Shaw" - Internet Archive [PAR] (Farr Dietrich: 1989, 1) However, Ibsen's realistic dramas were of great influence 
on ... His treatise The Quintessence of Ibsenism (1891) establishes his belief in 
the ... knew mostly from the translations of his friend and fellow critic, William 
Archer.