# Definition:Complex Plane/Historical Note

It is reported by Ian Stewart and David Tall, in their Complex Analysis (The Hitchhiker's Guide to the Plane) of $1983$, that John Wallis represented a complex number using this technique in his A Treatise on Algebra, but for some reason was ignored.
This has not been corroborated by $\mathsf{Pr} \infty \mathsf{fWiki}$, and there may be some doubt as to its truth, considering the given publication date of A Treatise on Algebra ($1673$) does not match that given by all other sources found ($1685$).