I have spent 2 more days in the Elsie-Perrinton quads and have some interesting results. The W limit of the sand area in the NE part of the Elsie Quad connects with a bowldery sand gravel ridge and may be a glacial rather than a lake feature. The beach on its S slope is 690' does not show any uplift between the outlet head and the N edge of the Elsie map. There is another beach above 680' which shows no differentiated uplift so I wonder if it is not the highest Warren rather than the 2nd Saginaw. What do you think? The large sandy area in NE part of Elsie that you thought was the Warren may be glacial outwash that was worked by waves and wind. I see Fig. 1 in the Monograph represents the bowldery area bordering the outlet in the Perrinton Quad; I wonder if they are a glacial feature or were instead dropped off by lake action or being rafted by ice-cakes in the spring. Many of these are deeply so embedded in the ground that I doubt they were dropped by ice. On the other hand they do not line up in a narrow strip as I would expect if they were along an ice border. If they were dropped by the receding ice, why are they so thick near the lake outlet and not elsewhere. I found the valley S of Maple River in Greenbush Tp. is a till area not filled with drift as much as border tracts. This is like the depression the Ann Arbor RR runs through N of the Huron River, or the depression the Huron River utilizes below Ann Arbor. Lake Saginaw occupied it after the ice disappeared and also the highest Arkona. The waters extended across the Maple Valley to the Imlay Outlet at Hayworth Creek. I was very interested in the area W of Duplain. Maple River formed a delta in Lake Saginaw at 730-735'. The bars and distributaries of the delta are identified by the contour lines. This delta was made by the southern outlet of Lake Arkona from the bend of the Maple River W. The tract of wet land runs W to Hayworth Creek was a southern outlet for the highest Arkona. The Perrinton Map shows the junction of the southern and northern outlet below Maple Rapids. I find the 1st Saginaw beach is well developed on W side of embayment S of Eureka at 735' and highest Arkona is 725', 2nd Arkona is 713' SE of Eureka by hand level. There is another notch in the moraine W of Eureka at 700-705', and a faint shore at 700-705' that causes loops in the 700' contour in Elsie Quad. I saw one of these from train at Duplain. Allen was here this PM and has arranged to pay my expenses to Washington to write up the Battle Creek Containment (?) area. I may start ther by middle of next week so I can get back by Thanksgiving. Mr. Alden wrote on the 5th that Director Smith is down with typhoid fever, but his condition was not alarming then. I hope your health is better now that the weather is pleasant. The stormy weather in Oct. was enough to make anyone sick.