Sentence:  The upshot of the evening was that I got the address of Pendleton 's studio - or rather , of the studio in which he gave his classes , for he did n't work there himself - and joined the life class , which met every Tuesday and <WSD>Thursday</WSD> from ten to twelve in the morning . 
Meaning of the word marked with <WSD> tags:  the fifth day of the week; the fourth working day