Interior of the Trier Cathedral

Graphite on cream wove paper, darkened to tan

Transparent watercolor and touches of opaque watercolor, charcoal, and graphite on cream wove paper

Watercolor over graphite on wove paper

Charcoal on tan wove paper

Black chalk on wove paper

Brown ink, watercolor, and gouache on off-white wove paper

Transparent watercolor on antique laid paper

Graphite, incised, on off-white wove paper

Blue and red-brown ink over white gouache on wood blocks pieced together

Black chalk, partially used wet, on brown compressed paper board

Watercolor and black chalk on off-white wove paper; verso: brown wash

Brown wash on off-white modern laid paper