Sketching Trees

I rarely do much drawing outside - just a quick sketch in pencil, a photograph, then work it up when I get home (I would say "when I return to the studio", but that would give you a very misleading idea of the facilities available to me).  I'm normally using ink at the moment.   Sorry you're not well, George: my health isn't that bad for an old chap, but arthritis is the plague that gets in my way.  (An old friend of mine was asked how he managed to keep well, given his age: his reply: "I just keep trundling on, like a tank".)   Wondering what people's favourite trees are to draw?  Mine is probably the Beech.  It would have been the Elm once - but they're nearly 100% gone now (there's one in the garden here: it died right back years ago, but has burst back to life, with multiple branches - since I've been living here, it's housed a green woodpecker and family, and ditto for blackbirds, bluetits, and at its base, a wren).  Perhaps a sign of hope - it's around twenty feet tall now.  I've got to go and draw it, haven't I?  Not wanting to post old work which you can see by going to my Gallery anyway.  That may be a job for today, although we're covered by a grey murk, looming up from the sea...