Thanks for your note. You mention three sisters, two of whom were in Chicago prior to entering a religious order. Is it possible that the third was also resident in Chicago?
I have looked on Google and the order of the Sisters of St Joseph of Cluny seems to be well spread across the world, particularly in poorer countries. However, there do not appear to be any Cluny nuns in the UK. The only site I found that belonged to the order, and provided information about it, was one for the Province of the US and Canada at http://www.clunyusandcanada.org/index.html
On the home page, it provides the details -
Sisters of St Joseph of Cluny
There is a contact page that provides the additional details -
7 Restmere Terrace
Middletown, RI 02842
Phone: 401-846-4826 Ext. 18
It is possible that the last email address may be the most helpful.
Do you have any links with a MERRIMAN family in Aberdeen, Orkney, and Altrincham??
Hope this helps
Jim Lancaster (Bury, Lancs.)