I have been researching a very distant relative of mine and he was in 3 Lunatic Asylums, he was released from the first one, only to be Admitted into the second one, then released from the second one to only to get admitted into a third one.(2/11/1905 to 17/11/1921) due to only records going up to 1912 i'm not sure if he ended up in a fourth one, i do know he died in 1931 (that's why i have ordered his death certificate to hopefully end the mystery).
So in all this research i know how frustrating it can be to only have certain records on certain sites, luckily i have an account on both Findmypast and Ancestry, so i did a quick search for you and found out all i could see on Ancestry from the "UK, Lunacy Patients Admission Registers, 1846-1912" and just Edited the Documents to ONLY show the parts that would be of interest to you, so hopefully i haven't broken any Copyright Laws or Forum Rules by doing it this way.
Hope this Information is of some help Helen.
NOTE: I don't research by request, it was only that i was doing this particular research at this time and in researching things, this Forum Post came up in a search.
for those that might be interested HOW i came to here, i typed
"lunacy patient records can i find out more information"
in Google and it was the 3rd on the list