a golden sunbeam that came to him from the middle window.
in this dawnlike ligh
Explanation:
In the first paragraph, the context is described. Doctor Pascal was at home on a hot summer day. It was really hot outside but it was calm and cold inside. "...came only a few scattered sunbeams ..." refers to the first phrase above. "....in the midst of the obscurity, made a soft brightness that bathed surrounding objects in a diffused and tender light" refers to the second phrase above.
