[1] According to E. F. Bleiler, in his 1983 Guide to Supernatural Fiction, "Bangs' most noteworthy achievement was a contribution to literary typology: the so-called Bangsian story, in which important literary and historical personalities serve humorously as characters in a slender plot line.
Bangs did not invent this subgenre, but his work gave it publicity and literary status."
Jess Nevins' 2003 definition (in Heroes & Monsters: The Unofficial Companion to the League of Extraordinary Gentlemen[2]) says it is "a fantasy of the afterlife in which the ghosts of various famous men and women come together and have various, usually genial, adventures", which closely agrees with Rama Kundu's 2008 definition.
[3] The genre was part of ancient Greek literature such as several dialogues of Lucian of Samosata and Aristophanes' Frogs.
Dante's Divine Comedy also features a voyage through Hell and interactions with famous people in the afterlife.