SOLVED. Juvenile fiction set in mid-late 1800s about two sisters and their friendship and love for one another. One sister named Meg. Maybe one was sick and maybe they were twins? [s]

[Juliane]

I read this in the late 1970s/early 80s. Vaguely remember a scene where the girls were sitting on a hill in the sunshine. Or was that on the cover?

[Minnikin]

A Summer to Die by Lois Lowry fits everything except the time period.

[Juliane]

Thank you! You are amazing!

[Juliane]

In other words- thank you for solving this!

[Kris]

Glad you found your book, Juliane. Here's the link for Minnikin's find - A Summer to Die by Lois Lowry.