Inserted with the book are two loose sheets of four sides of contemporary handwritten notes on relativity, dating from the late 1930s. These notes summarise key developments in general relativity of the period, including H. P. Robertson’s 1939 work on light‑bending, redshift, and the general theory. The handwriting is technically literate and clearly produced by a scientifically trained reader engaging directly with current research of the time. The notes provide an authentic glimpse into how relativity was being studied and interpreted in the inter‑war period.

The book itself is clean and sound, with no institutional markings. A compelling early relativity volume accompanied by original period scientific notes.