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This poster was created in 1925 by Mary Koop for the London Underground, to advertise the use of the transport network. It uses the crowds of people carrying umbrellas to show how the underground can be safe refuge from the rainy climate often found above. Art and Design was often commissioned to advertise the use of the underground. Much of the celebrated work was created by famous male artists and designers at the time, but few of the female contributors are as well known or as widely celebrated. There is little information about Koop or her practise elsewhere, but her contribution to the artwork for the London Underground is one of the most iconic of it's kind.