Hi Debbie This marriage and the daughter Joanna is a key point in a number of family trees. According to my information there was an Arthur Salwey who married Mary Searle and had 11 children and the lineage is reasonably well documented prior and after this marriage. I cannot however find Joanna as one of the children.
We have a large number of spelling variations (Arthur/Aurthur Salwey/Salway) so this is not clear. My guess is someone misspelt Arthur. A second guess is that Joanna Salway is unrelated to Arthur Salwey/Mary Searle. The Salweys were mostly seated in Shropshire whereas the Salway family seems to be Somerset ? based. I have seen a number of references to Joanna originating in the Somerset.