MAGIC ISLAND was a syndicated serial that first aired sometime in 1936
and consisted of one hundred thirty 12-minute episodes.  The story
line dealt with a wealthy woman and her search for her long lost
daughter.  She finds her on a man-made island that can submerge to

avoid detection.  The series was targeted for a juvenile audience and
small children are the main focus of the story line.
 

This collection is a little better than some I've seen because it contains continuous episodes.  The other split versions I've heard chop the beginning or end of each episode. Poor editing of MP3's. These are more enjoyable in my opinion.