Request #159

I’m looking for a YA book (or book of short stories with a reincarnation theme) I read while living in Kansas in the 1980s that followed a reincarnated soul. There was one soul, a young boy, who lived in ancient times along the Nile river. He may have had a deformity, and felt ostracized. I think he was secretly in love with a young neighbor girl, and I believe he ended up drowning in the Nile. There was another character from centuries ago who lived in Europe or the middle east, or Mediterranean area, who sat at night in the dark on the roof of their house with their father who taught him/her about astronomy. I can’t remember much about it, it was so long ago, and I’ve been looking for it for about 25 years. Thanks for any help!