My pdf attachment comes from "That Man Eastman", vol. 2, p. 224, published in 1954. The author, Charles John Eastman, in the preface states that the information in volume 2 was collected over a ten-year period. From my experience, comparing it with other sources, it has not been 100% accurate. The author sent out mailings asking respondents to fill in a simple form. Since this information was collected in the late 1940's or early 1950's, and since the listing for Orvil Charles Eastman is the most complete, he may have sent in the information for his family.