Passenger list for the schooner Hera, departed Seattle for Copper River 3/22/98, Seattle Post-Intelligencer, 3/23/98; Mining Agreement between Rudolph Agassiz (Hamilton, MA) and James Manker, a miner. 3/18/98. ML, Bk G (H&I), p. 720-723; Received power-of-attorney from Rennrelete (?) TMRD, p. 62; Mrs. Barrett, Mrs. Delander, Shorty Wagey, Northeast Oleson, McGee, Shelton, and Manker and Dempsey name Manker Creek, Remmington, 1898. The Golden Cross (?), p. 41; Co-locator with R.S. Agassiz, “Sky Light” Placer Claim, No. 1 above gorge on O’Brien Creek, 10/15/98, witnesses H. Smith, W.D. McGee, TMDR, p. 20; Co-locator with J. Manker of “Jas. Manker” Placer Claim, The Discovery, on Manker Creek, 7/20/98, witnesses, W.C. Bruce, W. Grogg, TMDR, p. 51; Locator, “Eureka”, quartz claim on O’Brien Creek, 10/10/98, witnesses H.Smith & W.D. McGee, TMDR, p. 59; Locator, placer claim on Hertle Creek, 10/12/98, witnesses H.Smith & W.D. McGee, TMDR, p. 59; Witness to W.D. McGee, QCMDR, 1898, p. 19; Locator, QCMDR, 1898, pp. 37; 41; James A. Manker proof of labor for W.C. McGee’s “Paystreak and “Jasper,” “O’Brien” placer claims on Hertle Creek, 1899. TMDR, p. 22, 23, 25; proof of labor on Manker “Discovery” claim, TMDR, 9/2/99, p. 24; Dooley moves camp to Manker Creek Camp on discovery claim and has dinner with Jim Manker, Dooley Diary, 2/27/99;
Manker Claim (adjoining Date claim) at mouth of Miller Gulch; first claim in district in which strike occurred; 20 working, taking out about 1oz. a day; “good claim but difficult to work, there being so much gravel to handle and the pay dirt being so scattered,” The Valdez News, 1:21. 7/27/01; Arrives in Valdez with Beck, has been prospecting the headwaters of the Shushetna for two months, The Valdez News. 1:28. 9/14/01;