 Complete the following phrase:  In 1909, Gehrke entered the Tunbridge Wells Girls Grammar School, a boarding school, in Royal Tunbridge Wells, where she began studying painting and developed an interest in nature, spending hours in Kew Gardens. In 1917, she began studying at the Royal Polytechnic Institution on Regent Street in London. Near the end of the war, she met Leif Lind Pettersen, who was visiting from Guatemala with his uncle Walter Lind. Walter Lind born Lind Pettersen was an Englishman, born to Norwegian parents, who also worked in Guatemala for Rosing Brothers and owned a coffee plantation. 