Sequeira's wedding ceremony in 1999 was covered on Australian national TV due to the celebrant and bridal party being dressed in costume, including Dracula, and Batman villains Penguin, Two-Face and Riddler.
His verse and non-fiction have appeared in Shoggoth and Terror Australis, and Sequeira also provided an introduction to the short story collection Skin Tight (1995) by fellow horror writer Bryce J. Stevens.
"His Last Arrow" in Charles Prepolec (ed) Gaslight Grimoire: Fantastic Tales of Sherlock Holmes (Edge Publishing) was nominated for a WSFA Small Press Award in 2009.
Two other Holmesian stories – "The Return of the Sussex Vampire" and "The Adventure of the Haunted Showman" – appeared in David Stuart Davies (ed) Sherlock Holmes: The Game's Afoot!
Sherlock Holmes: The Crossovers Casebook (Moonstone Publishing, 2012) features two Holmesian prose stories by Sequeira – "The Scion of Fear" and "The Adventure of the Lost Specialist".
Sequeira contributed the comic-book story "Unearthing the Facts" in Kagamono: Flowers and Skulls (horror comic anthology from Black Glass Press, 2011), illustrated by David 'Hyperdave' Richardson.
The one-shot anthology Tides of Hope featured stories and art by many Australian and international writers and artists, all of whom donated their work at no cost.
The line-up of writers and artists in the comic included Liz Argyll, Paul Bedford, Bernard Caleo, Greg Capullo, Gary Chaloner, W. Chew 'Chewie' Chan, Jason Chatfield, Chris Claremont, Rebecca Clements, Jeff Cruz, Julie Ditrich, Sarah Ellerton, Dave Elsey, Anton Emdin, Michael Evans, David Follett, Robert Forrest, Jason Franks, Doug Holgate, Paul Jenkins, Alex Major, Alex Maleev, Paul Mason, Tim McEwen, Stewart McKenny, Jessica McLeod, Michael Michalandos, Mandy Ord, Jason Paulos, Jan Scherpenhuizen, Mark Sexton, Jon Sommariva, Steve Stamadiadis, Kurt Stone, Komala Surman, Arthur Suydam, Jozef Szekeres, Tom Taylor, Ben Templesmith, Andie Tong, Daren White, and Colin Wilson (comics).
Academy Award-winning makeup artist Rick Baker asked to be the model for Professor Moriarty; Sequeira, Elsey and Cornell happily obliged and he is listed as a 'Stalwart Companion' in each issue's credits.
"Deadlocke and Doc Martin: Occult Investigators", a graphic story written by Sequeira and featuring real photography taken by him appeared in Too Much Red Cordial Issue 2 (Sydney University, 1995).