File Sketches made by N. H. Winchell Michigan Geological Survey, 1869-1870 Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials » Geology
File Sketches for Minnesota Geological Survey, 1886-1887 Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials » Geology
File Miscellaneous drawings Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials » Geology
File Miscellaneous illustrations Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials » Geology
File Illustrations for Geological studies, 1886 3 folders Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials
File Illustrations for Sketches of creation, 1870 Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials
File Fossil types, drawings by C. P. Whitfield 1 portfolio Box 23 In: Alexander Winchell Papers, 1833-1891 » Visual materials » Paleontology