Complex sentence: The snake-witch was first described by Sune Lindquist in 1955 and he tried unsuccessfully to find connections with accounts in Old Icelandic sources, but he also compared the stone with the Snake Goddess from Crete.
Split into simpler sentences: The snake-witch was first described by Sune Lindquist in 1955. He tried unsuccessfully to find connections with accounts in Old Icelandic sources, but he also compared the stone with the Snake Goddess from Crete.