Yes, very interesting...
A friend of mine was a high profile astrologer and had great interest in interpreting my late husband natal chart. My husband had his chart made when a child and neither then or when he tried again to have it lectured when he was eighteen, he could have an interpretation, because the astrologers said he could not be "astrologed". This motivated even more to our friend to have a try with the chart my husband kept from childhood.
After trying again and again to "see" something in it, finally the astrologer had to confess us that the chart disappeared strangely, not to be found again!
We could not re-make the chart because none of us could remember his time of birth.
(I have to add that once I asked my husband, quite sincere and true, if he would tell me if he was an E.T.E. Very naive of me, but I was not the only one that thought he seemed very much from out of this world, in very positive aspects, of course. He didn't answer. Just smiled.