Compiled by Ruth Stoller Many of the Oregon Trail immigrants of 1843 and 1844 settled in Yamhill Country, one of the oldest agricultural centers in the Willamette Valley. Agriculture is still the county"s primary industry. This early history of Yamhill County was compiled from state and county records and newspapers. Picturesque towns and the people who lived there are portrayed in detail. Size 8 1/2 x 11. 112 pages. 144 photos.