Chronology
| 1908 | Born in Stuttgart, Germany |
| 1926–29 | Attended Queen Katherine Convent, Stuttgart |
| 1929–31 | Studied at the State Institute for Photography, Munich |
| 1932 | Photographic assistant in the studio of Adolf Lazi, Stuttgart |
| 1932–33 | Photographic assistant for Olga Linekelmann, Hamburg |
| 1933–38 | Manager of Hartung's Photoshop, Peking |
While in China, Hedda made the following journeys:
| 1933 | Yungang Caves, Shanxi |
| 1934 | Zhengding, Hebei |
| 1934–35 | Chengde (Jehol), Hebei |
| 1935 | Hua Shan, Shaanxi |
| 1936 | The "Lost Tribe Country," Hebei |
| 1937 | Weihaiwei and Qingdao on the Shandong coast |
| 1940 | Baoding, Hebei |
| 1942 | Qufu and Mount Tai, Shandong |
| 1944 | Nanjing (Nanking), Jiangsu |
| 1946 | Married Alastair Morrison |
| 1946-47 | Lived in Hong Kong |
| 1947–48 | Lived in Sarikei, Lower Rejang, Sarawak |
| 1948 | Lived in Binatang, Lower Rejang, Sarawak |
| 1949–50 | Lived in Lawas District, Sarawak |
| 1951–52 | Lived in Kanowit, Middle Rejang, Sarawak |
| 1953 | Lived in Baram District, Sarawak |
| 1954–67 | Lived in Kuching, Sarawak |
| 1960–66 | Employed part-time by the Information Office of the Sarawak government |
| 1965 | Awarded Honorary Pegawa Bintang Sarawak for services to the state of Sarawak |
| 1967 | Settled in Canberra, Australia |
| 1991 | Died in Canberra, aged 82 |