Keizersberg Castle in Leuven

Black chalk and gray wash on off-white antique laid paper, framing line in gray ink

Brown ink

Transparent watercolor and gray and brown wash over traces of black chalk on cream antique laid paper, framing line in brown ink

Brown ink on antique laid paper probably toned with light brown wash, framing line in brown ink

Brown ink and brown wash on off-white antique laid paper, framing line in brown ink

Red chalk over graphite on cream antique laid paper, with a framing line in brown ink over red chalk

Black chalk and gray wash, partly incised, on cream antique laid paper, mounted down entirely

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

Black chalk on beige antique laid paper, framing line in brown ink and partial framing line in black chalk

Brown ink, transparent watercolor, and gray wash over graphite on antique laid paper

Black chalk and gray wash on off-white antique laid paper, framing line in black chalk along left and bottom margins and framing line in black ink along top and right margins; verso: red chalk [another hand?]

Graphite with touches of black chalk on parchment