To solve, write or compose by working studiously at night; to study.
To work diligently by artificial light; to study at night.
To work or write like a scholar.
To study by candlelight or a lamp; to study by night.
To elaborate, perfect, or compose, by night study or by laborious endeavor.
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing;
"She elaborated on the main ideas in her dissertation"