The register contains the original drawings of poisonous plants of Queensland by the artist and painter, Estelle Thomson. The register is marked 'Department of Social and Tropical Medicine'. At the time, this was an academic department within The University of Queensland's Medical School.
The drawings are in pen and ink and watercolour, and signed by the artist. Each drawing occupies a separate page and appears to have been completed on artist's paper which has then been affixed to the album. No indentifying names, either botanical or common, for the specimens are provided, except for one identified as a 'castor oil plant'. Also, the register includes at the back of the album some drawings of poisonous marine shell molluscs. As with the drawings of the plants, those of the shells are in pen and ink and watercolour, signed, and not captioned, except for one named as a 'cone shell'. The mollusc inhabiting the shell is also illustrated.
Estelle Thomson was a recognised and respected Queensland naturalist, author, artist and wildflower painter. It is understood The University of Queensland's Medical School commissioned these drawings and subsequently transferred them to the Queensland Department of Health. The drawings are original, strikingly lifelike, and feature a vibrancy of colour, suggesting the use of special pigments. Each is signed by the artist. The drawings hold artistic merit, are rare and predate the use of colour photography in botanical and wildlife description. In the field of medical education, they would have formed an important original source for knowledge on Queensland poisonous flora and shell molluscs. The register of drawings constitutes a rare public record for the State of Queensland.