On Ancestry Benjamin HAWKINS married Louisa BAKER

Looking at Gloucestershirebdm

http://ww3.gloucestershire.gov.uk/bmd/

There are 3 children born to HAWKINS/BAKER -

Clara - 1873 - Gloucester St Nicholas
Fanny - 1876 - Cheltenham, Tewkesbury
Pamela - 1877 - Cheltenham, Tewkesbury

You could contact the Gloucestershire Records Office (as advised on Rootschat)

Gloucestershire Archives - Genealogical Search

They do appear to have a record 17 April 1867

Where Benjamin HAWKINS age 16 of Tewkesbury, Nail Maker is Committed to Goal :Ref: Q/Gc6/5

and

Archives Homepages - Gloucestershire County Council - on line catalogue

13 hits on Lunatic Asylum including

Wotton Annual Report 1877-83

and

1879

Report of the visiting justices

report on the visitors of the lunatic asulum at Wotton etc etc.