what does it mean by sun-baked, sheltering wall

"Sun-baked" refers to something that has been dried or heated by the sun's rays. In the context of a sheltering wall, it likely means that the wall has been warmed or dried by the sun's heat.

A "sheltering wall" is a wall that provides protection or cover from the elements, such as wind, rain, or sun. In this context, a "sun-baked, sheltering wall" could be a wall that has been heated by the sun and offers a warm and protective space for someone to seek refuge or rest.