JEDDAH: More than 40 years after he last visited Jeddah, Graham Duncan, from Edinburgh, returned last week to the city he knew as a child — this time accompanied by his 20-year-old son, Joey, who wanted to see the legacy that Graham’s father, George, helped build. Graham left Jeddah in 1982 at the age of 18. His return on Oct. 5 was not just a journey into his own past, but an opportunity to introduce Joey to the city where his grandfather spent almost 15 years. Dr. George Duncan was an architec