The two previously unseen pictures turned up in Europe and are expected to raise £20,000 between them.

Hitler drew them in the early 1900s when he was based in Vienna and was practising various styles so that he might win a place at art college.

The picture of the elderly woman's face is similar to photographs of his mother and shows a lined and world-weary visage.

It was drawn in 1908 - the year after she died from cancer. The closed eyes might signify her demise....