Thank you for your reply 'DaveR'!
I know Pwllycrochan well as I used to live near it, however If this photograph pre-dates 1891 then the location must be somewhere on Anglesey. This is where my g.grandmother Elizabeth-Ellen was born (1871) and brought up in Llanfair PG until she moved to Colwyn Bay after the 1891 Census was taken. I wonder if it is a photograph of her mother Ellen (b.1851) in service!? Llanfair PG is near Penrhyn Castle, Plas Newydd and Plas Coch possibly even stretching to the Vaynol estate in Bangor. It would be interesting to find out because Elizabeth was illegitimate and the identity of her father was kept a big secret if I am to believe family stories, also we are apparently related to Watkin Williams-Wynn (wynn-williams?), however we can not be legitimate descendants as the majority of census returns show my family as working class!? Lot's of mysteries to be unlocked!
Thanks
Rach