Furthermore, according to Pliny the Elder and his citation by Gaius Julius Solinus, the sea voyaging time crossing from the Gorgades (Cape Verde) to the islands of the Ladies of the West ("Hesperides"[12], now known as São Tomé and Príncipe and Fernando Po) was around 40 days: this fact has prompted academic discussions about the possibility of further Roman travels toward Guinea and even the Gulf of Guinea. A Roman coin of the emperor Trajan has been found in Congo.[13]