I have swallow for 19a, which must be wrong for boric and bun to fit. Also bun is a hairstyle, with which I am happier, by comparison with fan and folic. I seem to be in a mess in the top right hand corner - further comment welcomed.
Thank you all for your very quick responses. I originally had swallow at 19 across instead of sparrow. Boric and Bun now fit, and I can go and get my "ugly" sleep !!!