The concerto took another six years to complete. There are many possible reasons for the delay, including self-doubt, his third symphony and an unhappy period in Berlin after a request from King Frederick William IV of Prussia. Nevertheless, Mendelssohn and David kept up a regular correspondence during this time, with Mendelssohn seeking technical and compositional advice. Indeed, this violin concerto was the first of many to have been composed with the input of a professional violinist, and would influence many future collaborations. The autographed score is dated 16 September 1844, but Mendelssohn was still seeking advice from David until its premiere. The concerto was first performed in Leipzig on 13 March 1845 with Ferdinand David as soloist. Mendelssohn was unable to conduct due to illness and the premiere was conducted by the Danish composer Niels Gade. Mendelssohn first conducted the concerto on 23 October 1845 again with Ferdinand David as soloist.