Keizersberg Castle in Leuven

Red chalk on off-white antique laid paper, framing line in red chalk and framing line in brown ink

Brown ink and brown wash over graphite on cream antique laid paper

Brown ink, brown and gray wash, pink and green transparent watercolor and white opaque watercolor over black chalk on cream antique laid paper, framing line in brown ink

Brown ink on off-white antique laid paper, inlaid to decorative mount

Black and white chalk and white opaque watercolor on blue paper, faded to light brown

Gouache, watercolor over graphite on cream antique laid paper

Watercolor, black chalk, and a modified gum arabic on cream antique laid paper, framing line in brown ink

Black chalk and gray wash, with a framing line in brown ink, on cream antique laid paper; figures at lower left and wash in sky at upper left are later additions

Black ink, gray and brown wash, and red and blue transparent watercolor over graphite on cream antique laid paper

Black chalk and white opaque watercolor on blue paper, framing line in black ink

Black chalk on cream antique laid paper, later brown ink, partial framing lines in brown ink and black chalk

Black chalk on off-white antique laid paper; framing line in black ink