Welcome! Very interesting, indeed! Linda was always very cryptic about her birth data and was known to pay others to help her provide false information. So, is it at all possible that even April 9 was a date she made up? Probably not, but it does provide food for thought. Everyone knows how Linda felt about Easter.
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"Never mentally imagine for another that which you would not want to experience for yourself, since the mental image you send out inevitably comes back to you." Rebecca Clark