In Copenhagen Abel was given a letter of introduction to Crelle by one of the mathematicians there. Abel met Crelle in Berlin and the two became firm friends. This proved the most useful part of Abel’s whole trip,particularly as Crelle was about to begin publishing a journal devoted to mathematical research. Abel was encouraged by Crelle to write a clearer version of his work on the insolubility of the quintic and this resulted in Recherches sur les fonctions elliptiques which was published in 1827 in the first volume of Crelle’s Journal, along with six other ppers by Abel. While in Berlin, Abel learnt the position of professor of mathematics at the University of Christainia, the only university in Norway, had been given to Holmboe. With no prospects of a university opst in Norway, Abel began to worry about his future.