More posters this week: Poster Girls (the title is meant to be a funny double entendre but is a bit annoying in its nudge nudge implications) has just opened at the London Transport Museum and runs for a marvellous fifteen months. Its remit is to highlight the work of women artists whose identity was often cloaked in anonymity: the work would be unsigned, or disguised by initials, or subsumed under the name of an advertising agency. (In exactly the same way many of the unattributed textiles we use as endpapers were likely to have been by a woman.) This 1925 poster was by Dora M Batty.