The Royal Hospital for Incurables

Hi,

I have a distant uncle, Charles O'Reilly, whose entry in Glasnevin Cemetery's death register says he died at the "Royal Hospital for Incurables, Donnybrook" on 16 November 1940.  I was hoping someone might be able to point me in the right direction for any sources that might be available for researching relatives who were at this hospital?  What I'd like to be able to find would be things like a last known address or next of kin, if records of such things were kept.

Thanks,

Amanda