It can be nerve-racking, plucking up the courage to whip out your sketchbook for the first time in a public place. It's best to just get it over with: once you've started, it's fine. Here's what I was sketching in the photo above:
Any attention you get is generally very positive. Remember: most people don't draw at all, so however worried you are about your efforts, most on-lookers are likely to be impressed.
And you do get used to being observed. I now really enjoy the opportunity to share the moment with strangers, particularly if we don't share language, so wouldn't otherwise 'meet'.
These photos were all taken in Vietnam. The first time I found the nerve to draw people close-up, the lady above came and watched, with a huge grin. When I'd finished, she seemed to be asking me to draw her, so I did, then I broke my usual rule and gave the drawing to her.
Here, I'm sketching some roadside poultry traders: the baskets on the backs of the scooters were full of live chickens. Some hung from their feet from pushbikes, like panniers. Women crouched on the floor, weighing tethered chickens with hand-held, metal scales. I started on the periphery, but quickly got drawn in by people’s attention. There was much giggling about those I had drawn. 
I sat beside a river in Hoi An, to draw some squatting women working on a jetty (eclipsed here by my onlookers). It must have been the school’s lunch hour, as I quickly attracted a handful of little boys in uniform, who talked animatedly to one another, obviously about me. I wished I could understand and talk to them.
This photo was taken a couple of minutes later...
I showed them the rest of my sketches, then tried to draw one boy, although he seemed to have no idea that he should keep still!
I soon had an audience, as you can see, peering over each others' shoulders to watch me draw. Somebody indicated that the marbles were ‘longan' (he wrote this carefully in the corner of my sketch) and gave me one to taste. It looked like a tiny, discoloured lychee, with less flesh but a more concentrated flavour.
If you fancy having a go, there is a post on my main blog, with loads of 'hot tips' about drawing people in public places.
If you want to hear more about how I draw, take a look at one of my short videos, or take a peek inside some of my other sketchbooks, such as those from my travels, to countries like China, Namibia, Australia and various other places all over Europe.
