  Though this may not solve the Marsh Street Hauntings, it may explain another story of Popsy being attacked by the undead - the story of being choked by an unseen figure when younger. Allow me to go all Dana Scully and follow me into tales of lore… In the olde dayes, people had the story of the Succubus or Old Hag.
This was a demon who, in the middle of the night, would attack a man, wrapping her legs around him, Xenia Onatopp stylee, and humping him (Interesting note – German for Hag is Mare. A Mare who comes at Night. NightMare, you see!). Reports come from all over the world of men who feel they are being strangled, and some have claimed to see a ghostly figure on top of them. There is an equivalent that attacks women – the Incubus. There was a tribe in the South Sea Isles that had a high occurrence rate of this story. Investigators went to have a look and found something intriguing. The tribe had a genetic disposition to Sudden Adult Death Syndrome – kind of like what happened to Marc Vivien Foe – and other breathing conditions.
They found that during sleep, the body would sometimes stop breathing, causing the brain to jolt the person away, making them disorientated. Now, didn’t Popsy suffer from asthma when younger…? Come on Greg! Give me a job as a documentary maker at the Beeb! I’d be about ten million times better than some guy who goes around interviewing stupid Americans and making them look stupid by raising an eyebrow at the right time. 
