O'Malley or Malley

[heywood]

This newspaper snippet is interesting and hopefully helpful. I can’t see the announcement.

1st April 1890 Maidstone Journal and Kentish Advertiser

“DEATHS.
.. Spencer Sands, eldest eon the late Mr Edward .Sands, of Linton, near Maidstone, and eldest grandson of the late harles Mai ley, Esq., formerly Cong Abbey, Co. Mayo. Ireland”

[heywood]

As I mentioned earlier, there are several snippets re Charles Malley, Cong Abbey and bankruptcy /insolvency 1861.

The Griffiths Valuation record I posted earlier shows ‘House, Mill, Stores’ and another ‘Land’ for Charles Malley, Creggaree.

[Maiden Stone]

You mention ‘Cong, Castlebar’. These are different places. Ashford Castle is Cong which was purchased by a Guinness member, see Maiden Stone’s post

Cong and Castlebar are about 20 miles apart.
Map https://www.swilson.info/regdistmap.php?gregdistid=10 Enlarge map to see locations of Cong Abbey and Ashford Castle. Cong is in Ballinrobe Superintendent Registrar's District for births, marriages and deaths. Ballinrobe town is a few miles north, on the way to Castlebar. Select Cong from list of civil parishes   to see a list of townlands in Cong civil parish.

Towns and villages in Mayo. Several pages of information for each.
https://www.mayo-ireland.ie/en/towns-villages/towns-villages-overview.html
It says under "Cong Abbey" in the section on Cong that Sir Bernard Guinness began rebuilding the abbey in 1860.
 

[Maiden Stone]

   Charles O Malley of Cloonane, Mayo and his brother J B O' Malley ran the National Bank in Castlebar. 

https://irelandxo.com/ireland-xo/history-and-genealogy/timeline/castlebar-town-1830s
Spencer Park, seat of Major O'Malley D.L.

List of subscribers to "Topographical Dictionary of Ireland" by Samuel Lewis, published 1837. Surnames beginning with O include:
O'Malley, James, Esq. Cloonane, Castlebar
O'Malley, Major Owen, D.L. & J.P., Spencer Park, Castlebar
See also letter M for Malley/Mally &c.
https://libraryireland.com/topog/subso.php