Thanks, Ros. Yes, the other guide seemed rather misinformed. Maybe a "London Day Tripper's Guide". Roedd fy nghyfaill, Gareth Williams Dowlais, yn disgrifio Cymru fel sospan. Mae ei garn yr M4, ac ar ben y carn, twll bach ag enw Llundain. A ffrind, Gareth Williams Dowlais, once described Wales as a saucepan, with the M4 as its handle, and at the other end of the handle a little hole, called London. Pob hwyl