Request #173

 I’m looking for a book that I read in the mid-1970’s and, as memory serves, the description of the characters indicates the book was written in the early to mid-1970’s.

A teenage brother and sister are orphaned. The remaining grandparents divide the sister and brother. The brother goes to live with their grandfather (not sure if maternal or paternal but was not the spouse of the grandmother). The grandfather lives in a rural area and the boy loves living with him. They do lots of “outdoorsy” stuff. The girl goes to live with her grandmother (also not sure if maternal or paternal, but definitely was not the spouse of the grandfather) who likes a more cosmopolitan setting, seemed cranky and had to keep to a strict budget to live her cosmopolitan life. The grandmother took the granddaughter to stay at a hotel in, possibly, Switzerland each year – very formal setting. The grandmother complained that her granddaughter was costing her money. I believe the girl had a relationship with a boy at some point. The brother and sister stayed in touch, but barely. I don’t remember the ending.