Hermes and Apollo
According to legend, Hermes was born in a cave on Mount Cyllene in Arcadia. When dawn broke amazingly he was born. Maia wrapped him in swaddling bands, then resting herself, fell fast asleep. Hermes, however, squirmed free and ran off. This is where Apollo, his brother, grazed his cattle. Hermes stole some of the herd and drove them back to Greece. He hid them in a small grotto near to the city of Pylos and covered their tracks. Before returning to the cave he caught a tortoise, killed it and removed its insides. Using the intestines from a cow stolen from Apollo and the hollow tortoise shell, he made the first lyre. When he reached the cave he wrapped himself back into the swaddling bands. When Apollo realized he had been robbed he protested to Maia that it had been Hermes who had taken his cattle. Maia looked to Hermes and said it could not be, as he is still wrapped in swaddling bands. Zeus the all powerful intervened saying he had been watching and Hermes should return the cattle. As the argument went on, Hermes began to play his lyre. The sweet music enchanted Apollo, and he offered Hermes to keep the cattle in exchange for the lyre. Apollo later became the grand master of the instrument, and it also became one of Apollo's symbols. Later while Hermes watched over his herd he invented the pipes known as a syrinx (pan-pipes), which he made from reeds. Hermes was also credited with inventing the flute. Apollo, also desired this instrument, so Hermes bartered with Apollo and received his golden wand which Hermes later used as his heralds staff. His Roman name is Mercury. http://www.pantheon.org/articles/h/hermes.html