Il ne faut pas mélanger torchons et serviettes. Originally, this proverb has a strong social connotation: tea towels are for the poor and the servants, napkins for the bourgeois and the aristocrats. And one should never mix the two, socially, or otherwise.
A detailed map of South West France drawn by Perry. Lots of details of villages, monuments, events and characters of the region. Available as an A2, A3 and A4 print.