Handsworth St Mary Confirmation records

[Ratty2]

Would love to know how to find the Confirmation records 1866-1876 for St Mary's parish church, Handsworth.
The Vicar tells me there is a box of them at Birmingham Library. "the Box of Handsworth, St Mary, records" I have tried the Brm Library online catalogue and I have tried the Staffordshire Archives also. Staffordshire archives have only directions to find Handsworth church. 
I am also acutely aware that Covid has placed restrictions on us all; and I am unable to visit in person from Australia.

My search is for: Fanny Flinn, Soho Road, Handsworth born 1858. Her father was George Frederick Flinn.
Also for Walter Herbert Withers, born 1854 in Nursery Rd, but by 1866 was either at 2 Soho Rd or in Farm Street.
Fanny and Walter married at St Mary's in 1887.

You assistance in this would be most gratefully received.
David

[mckha489]

https://discovery.nationalarchives.gov.uk/details/r/c1da7ccd-fd77-49ac-bdab-39cc8691b033