1880-2010 1935- 1954- 20thcentury american architecturalphotography authors biography cantileverbridges cantileverbridgesgreatbritain childhoodandyouthappelt collectionscentrecanadiend'architecture dieter exhibitions familyappelt familyrelationships germanphotographers germany greatbritain homesandhauntsappelt intellectuallife juvenileliterature kathi photographers railroadbridges scotland sociallifeandcustoms southqueensferry women