Andrew Wyeth, Letter to Martha Burchfield Richter, Pg. 2, April 8, 1968; ink on paper, 10 1/2 x 7 1/4 inches; Charles E. Burchfield Archives, Purchased with funds from the Vogt Family Foundation in honor of Dr. Edna M. Lindemann, 2004
Andrew Wyeth , Letter to Martha Burchfield Richter, Pg. 3, April 8, 1968; ink on paper, 10 1/2 x 7 1/4 inches; Charles E. Burchfield Archives, Purchased with funds from the Vogt Family Foundation in honor of Dr. Edna M. Lindemann, 2004
Andrew Wyeth , Letter to Martha Burchfield Richter, Pg. 4, April 8, 1968; ink on paper, 10 1/2 x 7 1/4 inches; Charles E. Burchfield Archives, Purchased with funds from the Vogt Family Foundation in honor of Dr. Edna M. Lindemann, 2004
Catherine B. Parker (1926-2012), Whirling Wind, undated; ink on paper, 13 1/2 x 16 1/2 inches (sight); Burchfield Penney Art Center Archives, Gift of Harriet and Mortimer Spiller, 2005
Charles E. Burchfield (1893-1967), Idea Book, Vol. 1, 1915-1916; hard cover commercially made composition book, 8 1/8 x 8 ½ inches; Charles E. Burchfield Foundation Archives, Gift of the Charles E. Burchfield Foundation, 2006
Charles E. Burchfield (1893-1967), Idea Book, Vol. 2, 1915-1916; hard cover commercially made composition book, 8 1/4 x 6 3/4 inches; Charles E. Burchfield Foundation Archives, Gift of the Charles E. Burchfield Foundation, 2006
Charles E. Burchfield (1893-1967), Sketch Book, ca. 1916-1919; Commercially made composition book, 6 3/4 x 4 inches; Charles E. Burchfield Foundation Archives, Gift of the Charles E. Burchfield Foundation, 2006
Charles E. Burchfield (1893-1967), Sketch Book, ca. 1913; hard cover commercially made composition book, 8 1/4 x 6 3/4 inches; Charles E. Burchfield Foundation Archives, Gift of the Charles E. Burchfield Foundation, 2006
Charles E. Burchfield (1893-1967), Sketch Book, ca. 1916; hard cover commercially made composition book, 8 1/4 x 6 3/4 inches; Charles E. Burchfield Foundation Archives, Gift of the Charles E. Burchfield Foundation, 2006