At this point Grotefend took the matter up. Having a taste for puzzles, he made a bet with drinking friends around 1800 that he could decipher at least part of the Persepolis inscriptions. His first discovery was communicated to the Royal Society of Göttingen in 1802, but his findings were dismissed by these academics. His work was denied official publication, but Tychsen published a review of Grotefend's work in the literary gazette of Göttingen in September 1802, which presented the argument made by Grotenfend. In 1815, Grotefend was only able to give an account of his theories in the work of his friend Heeren on ancient history. His article appeared as an appendix in Heeren's book on historical research and was entitled ""On the Interpretation of the Arrow-headed Characters, particularly of the Inscriptions at Persepolis"".