We have a photo of their headstone in our Willetts Family Album - here
Marriage 1879
WILLETTS Philip WILLETTS Louisa Dudley, St Edmund Dudley Register Office 201/006/465
Here they are...
1901: King Street, Rowley Regis, Staffordshire
Philip Willetts 43 Head Chainmaker Cradley Heath, Staffs
Louisa Willetts 41 Wife Grocers Shop Keeper Cradley, Worc
Albert Willetts 14 Son Horse Driver for Fruiterer Cradley, Worc
Louisa Hardy 11 Dau Niece Cradley Heath
George Hardy 7 Nephew Cradley Heath
Jack Hardy 5 Nephew Stourbridge, Worc
Amy Stokes 13 Dom Serv Quarry Bank
1891: 18 King Street, Rowley Regis
Philip Willetts 34 Head M Chainmaker Rowley Regis, Staffs
...so where is Louisa?