Annie Mole's, webmaster of Going Underground, daily web log (blog).
If you like this you'll LURVE One Stop Short of Barking, THE fun and informative BOOK about travelling on the London Underground.
He doesn't seem to do anything, but was wearing the same black and white suit when I last saw him. He was around this point 51.5004, -0.136213 when I spotted him and was travelling towards Richmond, but nipped off the Tube before I could see where he was heading.
A family sitting near me, saw me taking pictures, so they looked round and then started speculating as to why he might be wearing the mask.
The mother told her kids that he might have had a strange skin condition. It was a little too early in the day for him to have been going to a Halloween Party and there was just something very casual about him, as he checked his iPod, as though he travelled in the mask quite often. When I saw him before it was a weekday at about 8.30 in the morning.
Anyway, if you've seen him, know him, or indeed are him, please let us know in the comments. Any theories as to why he's wearing the mask would be much appreciated.
A fascinating and energetic mix of the traditional and the very modern, Bangkok is a microcosm of Thailand and an endlessly diverting introduction to this fascinating country. The intoxicating sights and sounds of Bangkok are all around you when you stay at one of our hotels in Bangkok.
You’re never short of things to see or do in London. From theatre, musicals and museums to shopping, urban greenery and sheer monumentality, London does it bigger and better, and if you need a place to stay in the nation’s capital, Marriott has London hotels to suit you.
New York is on everyone’s travel wish-list, and if you’re looking for a place to stay when you visit the Big Apple, Marriott has dozens of New York hotels all across the city and beyond. If New York is your destination, book your New York hotel online with Marriott.
In the middle of the Nevada desert, neon-lit Las Vegas is a city like no other, and when you book your stay at one of Marriott's Las Vegas hotels, you can enjoy the full, glitzy spectacle of this 24-hour city.
From Monterrey to Cancun, you can be sure of a warm welcome and first-class service when you stay at one of Marriott's Mexico hotels. The historic home of the Aztecs, chocolate and tequila, Mexico is a vast and diverse country with something for everyone.