 Barker was a devout Christian , and produced religious @-@ themed works throughout her life . She published eight postcards and five guardian angel birthday cards for the Society for <unk> Christian Knowledge in 1916 and in 1923 respectively . Christmas cards were designed for The Girls ' Friendly Society over a 20 @-@ year period , and the first three designs sold out a combined printing of 46 @,@ 500 in 1923 . An original design for the society called The Darling of the World Has Come was purchased by Queen Mary for ₤ 5 @.@ 5 @.@ 0 in 1926 . The Croydon Art Society hung Barker 's booklet cover design for the Society for the <unk> of the Gospel in its November 1919 exhibition . 
