Mixed-media theatrical costume illustrations with fabric swatches

A pair of hand-drawn theatrical costume illustrations on textured off-white cardstock, featuring fabric swatches and handwritten annotations. The upper drawing depicts a woman in a long, dark purple gown with white lace-like detailing on the bodice and a walking stick; it is annotated 'Humulus the Mute', 'The Duchess', and bears a signature in the upper right appearing to read 'Sally Kathleen Mitchell'. A swatch of burgundy velvet and lace is pinned to the corner. The lower drawing depicts a male figure in an 18th-century style green and white frock coat, annotated 'The Lustful Widow', 'Conte', and 'Act I', with another signature reading 'Sally Kathleen Mitchell'. This lower illustration includes a small note stating: 'All the green in this costume should be of cotton velvet. I couldn't find any in any color.' A small silver-toned braid swatch is attached. The illustrations are rendered in what appears to be gouache or watercolor with graphite. The paper shows slight yellowing consistent with age, and the edges appear intact. The style is consistent with mid-to-late 20th-century stage design, though the specific production dates are unverified. The attribution to Sally Kathleen Mitchell is based on the visible signatures which are consistent throughout the pieces, though they remain unauthenticated by a specialist.

I have examined the provided images of two theatrical costume illustrations on textured cardstock. Based on what I can see, the works display characteristic mid-to-late 20th-century stage design techniques, including the use of gouache and graphite with relevant fabric swatches. Both pieces bear signatures consistent with Sally Kathleen Mitchell; however, these signatures must be treated as a hypothesis and would need physical inspection to confirm. I cannot determine the exact age or chemical composition of the pigments from a photo, and the specific productions of 'Humulus the Mute' and 'The Lustful Widow' remain unverified in this context. The value estimate is based on the assumption that these are period-correct designs by the identified hand. Market demand for theatrical ephemera is generally driven by the reputation of the designer and the significance of the production. While the condition appears good with minor yellowing, a physical examination is required to check for structural integrity of the paper and the security of the attachments. To confirm the identity of the artist, one would need provenance documentation or a comparison by a specialist in theatrical archives. If these illustrations were determined to be later copies or not by the hand of the attributed artist, the value would likely decrease to a decorative range of $50–$100. Conversely, if documentation linked these to a major professional production, the value could exceed the current estimate. As it stands, the items represent a charming and technically proficient example of the costume designer's craft.