There was also a Probate File for Agnes :
PERRIN - Agnes - of 4 Greyhound Road Mansions**, Hammersmith, Middlesex - Widow - died 
20 November 1932 :   PROBATE - London - 29 December to Percy Kennett COOK*, Inspector.
Effects :   (Pounds sterling) 56-6s-4d
[Source:  England and Wales Probate Calendar @ ancestry.com ]
[* Don't know if related to Percy Kennett COOK ?  He was born, Kent, ENG, 1875.   
 **Agnes was at same Greyhound Road address in 1911. ]