Ignaz Reich, Beth-El. Ehrentempel verdienter ungarischer Israeliten, (Pest: Alois Bucsánszky, 1856), 61–9.
The following is the earliest published biographical sketch of Joseph Joachim, excerpted from Beth-El by Ignaz Reich (1856). It is clearly based on information that could only have come from Joachim’s family, though dates are not reliable. Joachim’s first visit to London was in the spring of 1844, for example.

JOACHIM JOSEPH.
More legible pdf: Reich_Beth-El_1856