Daingean [Dangan Uí Bhiggin] is an old castle said
to be built by the aforesaid Caisin about the same time but
wrested from him by Peter de Clare, who in his turn lost it with his
life, being killed by the MacNamaras, whereupon his brother John de
Clare removed the chief seat from this to Bunratty. It is about two
miles north of Kilkishen.
From 
Letters
on the Antiquities of County Clare, 1835 by Eugene O’Curry
Reference in
Ordnance Survey Letters
by J. O’Donovan and E. Curry, 1839
Description in County
Clare A History and Topography 1837 by Samuel Lewis
Description
in Parish of Quin by Conchubhar
Ua Briain
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On 1842 Ordnance Survey Map (using GenMaps)
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On 1842 Ordnance Survey Map (via MapBrowser)
