The front page of the song sheet in the British Library shows Dan in the corduroy and brass buttons typical of the 1890s (i) The price of 3 shillings (a little under £6 at 2016 prices (ii)) suggests that the sheet was aimed at a middle-class customer.

(i)  Simmonds, J. & Biddle, G; Eds. The Oxford Companion to British Railway History, p387
(ii) Bank of England Inflation Calculator http://bankofengland.education/inflationcalculator/