Keizersberg Castle in Leuven

Brown ink, brown wash, black chalk on oiled antique laid paper, incised, framing line in black ink along right, top and bottom edges

Black chalk on parchment

Black and brown ink and gray wash over black chalk on cream antique laid paper

Brown ink on antique laid paper

Black chalk and gray wash on cream antique laid paper

Brown ink over black chalk, squared in black chalk, on off-white antique laid paper

Black and red chalk [possibly a counterproof?] on off-white antique laid paper, framing line in brown ink

Graphite on cream antique laid paper

Red chalk on cream antique laid paper

Brown ink and brown wash over black chalk on cream antique laid paper, mounted, framing lines in black ink

Brown ink and gray wash, incised, on white antique laid paper, framing line in brown ink

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