The A. C. Richards Garden – The Blackwell Survey 1860. 1936. American. Watercolor, gouache, and graphite on paperboard. William Merklin and Gilbert Sackerman, artists. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain, via https://www.nga.gov/collection/art-object-page.22580.htmlThe John B. Hull Estate – The Blackwell Survey 1860. 1936. American. Watercolor, gouache, and graphite on paperboard. Gilbert Sackerman, artist. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain, via https://www.nga.gov/collection/art-object-page.22569.htmlW. A. Wheelock Estate. 1936. American. Watercolor, gouache, and graphite on paperboard. Tabea Hoser, artist. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain, via https://www.nga.gov/collection/art-object-page.22593.htmlWilliam. A. Wheelock Estate. 1936. American. Watercolor, gouache, and graphite on paperboard. Tabea Hoser, artist. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain. via https://www.nga.gov/collection/art-object-page.22599.htmlFlower garden from estate of George Lewis. Blackwell’s Survey ca, 1936. American. Watercolor, gouache, and graphite on paperboard. Virginia Richards and William Merklin, artists. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain. via https://www.nga.gov/collection/art-object-page.22622.htmlWood residence. ca. 1936. American. Colored pencil and graphite on paper. Tabea Hoser, artist. Index of American Design. Collections of the National Gallery of Art, Washington, DC. Digital image in the public domain. via https://www.nga.gov/collection/art-object-page.22825.html
