Complex sentence: He sees a young Aborigine with a spear in his hand and a dingo at his side, but although Toby is terrified at first, he soon realises that the other boy is actually a friend.
Split into simpler sentences: He sees a young Aborigine with a spear in his hand and a dingo at his side. But although Toby is terrified at first, he soon realises that the other boy is actually a friend.