Hi Betty,
Sounds like your cruise is picking up in activity. Good for you. Yes, we liked St. Helena also. We went into the inner island and saw all the lush green from the rains and went to Napoleon's grave, home and the governor's home. It was a fun small island. Would love to go back but the only way to get there is by boat as you know.
Continue to have a great cruise, enjoy those sea days and rest up for Rio!!!