Mendel's Draft Letter to Nägeli appears in The Behavior of the Hawkweeds

In The Behavior of the Hawkweeds Antonia, the narrator and protagonist, receives a letter as a gift from her grandfather and in turn gives the letter to her fiancé Richard. The letter was a draft of a later letter written by Gregor Mendel and addressed to Karl Wilhelm von Nägeli. Historically, Nägeli is the scientist who successfully convinced Mendel to stop his genetics work. Within the story, the letter functions as a bridge across time, linking Mendel to Richard and Tati to Antonia. As Richard has never asked Antonia about the letter's provenance, she is pleased when the young Sebastian Dunitz asks her about it.

The Apostles of Linnaeus appears in The English Pupil

The apostles of Linnaeus were a group of Linnaeus' students who carried out various biological expeditions throughout the world...