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       Author [Abbot, Henry L., Williamson, R.S.] Full Title Routes in Oregon and California. Profiles sheet no. 1 from Benicia to Fort Reading and from Fort Reading to Vancouver; from explorations and surveys made under the direction of Hon. Jefferson Davis, Sec. of War by Lieut. R.S. Williamson, U.S. Topl. Engrs. and Lieut. H.L. Abbot, U.S. Topl. Engrs, H.C. Fillerbrown, C.D. Anderson and J. Young assts. 1855. (1861) Publisher [A.O.P. Nicholson I-XI, T. Ford XII.] Author [Abbot, Henry L., Williamson, R.S.] Full Title Routes in Oregon and California. Profiles sheet no. 2 from the head of Des Chutes Valley to Vancouver and from Vancouver to Fort Reading; from explorations and surveys made under the direction of Hon. Jefferson Davis, Sec. of War by Lieut. R.S. Williamson, U.S. Topl. Engrs. and Lieut. H.L. Abbot, U.S. Topl. Engrs, H.C. Fillerbrown, C.D. Anderson and J. Young assts. 1855. (1861) Publisher [A.O.P. Nicholson I-XI, T. Ford XII.] 
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