Sentence:  17th Drew in the dead body in the corrected sketch in Pen & Ink. It is rather dreary. Worked at sundries from Self in the <WSD>looking glass</WSD> (8 hours). / 18th worked all day from self in <WSD>looking glass</WSD> in shirts & draws. ... 
Meaning of the word marked with <WSD> tags:  (t=smooth surface that reflects light so as to give an image of what is in front of it). (from 1520s)