Today spend a bit of time looking for the reference to the Gibbs- Starling map of 1851. I have a copy in digital form but its full of photocopy marks and this obscures some of the information. I found the reference and its at the Smithsonian, Cartography division at College Park. We have to go there anyway and were planning on a visit in October. But Mackey has several nice images in the Kalapuyans and OSU appears to have a clean copy in their map library. I will be going to OSU and WUU tomorrow.
But this speaks to problems in the research on Oregon history. If these resources are not readily available in Oregon, how do historians do their work? we can limp along with poor sources or get a good copy with all of the details we need.