It is widely believed that Weierstrass ignored Eisenstein's theory of elliptic functions and developed an alternative treatment, which is now standard, because of a convergence issue. In particular, the Eisenstein series of weight two does not converge absolutely while Eisenstein's theory assigned a value to this series. It is now well-known that the quantity which Eisentsein assigned to this series is not only correct, but it has interesting interpretations and attracted much attention. It has been proved by Damerell in 1970…