In the first shot from inside the church, one member of the congregation rises when the minister calls for the singing of a hymn - a woman in a hat. In the start of the next, closer shot of that half of the congregation, nobody is standing and then the woman stands again, this time with the rest.
The town's 'Civil War General' is listed as having been born in 1845. That would make him 15 at the war's start and 20 at its end. He could not have been a Civil War General at that young age.
In the two newspaper headlines, The Concord Enterprise spells the family surname as Quincey, while Corinth Home News has it as Quincy. The former appears to be correct as that is how Harry spells it in his confession.