While writing the article 1873 Letter from Agnes Billups, probably to Emily Hall, I asked myself some of the Grattons married in Sheffield, Yorkshire, and not in their home parish of Dronfield. I didn't know. But soon after finishing the article, I saw a topic on rootschat that raised the same question. The topic was called "Anything special about Pattingham" and is found at: https://www.rootschat.com/forum/index.php?topic=890798.msg7647584. Someone asked why a couple would marry in Pattingham when they lived 32 miles away. The answers included the statements:
"A vicar once told me that couples usually married in the large diocese church, which could be several miles from their homes."
"I believe, although I may be wrong, that the 'large church' mentioned is usually the mother church for the diocese. Many coupled chose to travel to and marry in the mother church in order to save money. If they married in their Parish church they had tp pay to both the Parish church and the mother church. Going straight to the mother church cut out a payment."
So that might be the reason why at least some of the Grattons married in Sheffield. I don't know for sure whether the parish church in Sheffield, St Peter and Paul, was the mother church for Dronfield in the 1860s, but I'm pretty sure that has been the case today since 1914. I'm not familiar with Church of England parish boundaries and the like, but a couple articles seemed to say that St Peter and Paul was granted cathedral status in that year and the diocese included Dronfield.
I say "at least some" because only 3 of the Grattons married at St Peter and Paul Church, namely Emily (in 1861), Agnes (1869), and Henry (1878). Maria married Henry Boswell at St Philip, Sheffield, in 1861, but Henry was living in Sheffield at census time that year. That may have been his home church. Francis married John Birley at St Silas, Sheffield, in 1873. I don't know where John was living in 1871.
Four of the marriage records said that both parties were living at the same address when marrying. That doesn't seem to be very likely, when you think about it. But a possible reason for that was in a different thread at rootschat, "Marriages mid 19c" at https://www.rootschat.com/forum/index.php?topic=884731.msg7577552#msg7577552, which included this comment:
Banns had to be called at both the bride's parish and the groom's parish. Much easier to live at the same address for the requisite period of time, and just use the one parish.