In case you were unable to translate the message from nessynes :
Hello Brian: my family didn't arrive on the first voyage of the Mimosa, I don't know if it was on a later arrvial or on the Vesta. They were called Tom Williams and Helen Evans (his wife). my great grandmother Jane Williams also cam on the boat and her sisters Margaret and Helen and later Maria was born here. I think that they returned to Wales some time after, if I remember more I will let you know ... I'm sorry I don't know the lanaguage ... I will be travelling to Wales at the end of May......there are many Evanses there.......I will be looking for more information, regards !!