In 1928 the OS sent him to the Middle East to collect aerial photographs that had been produced during the First World War and which were stored at Baghdad , Amman , and Heliopolis .
Crawford enjoyed foreign travel .
In 1928 the OS sent Crawford to the Middle East to collect aerial photographs that had been produced during the First World War and which were stored at Baghdad , Amman , and Heliopolis .
Crawford enjoyed foreign travel .