O dear! just when I thought certainty was within reach.

I don't know the answer.

I only have information about my great-grandfather, Captain Samuel's son, in the name of Samuel, b 27 Nov 1828. That's how he appears in the lists of Cambridge alumni and such other documents as I've been able to trace.

I'd not be surprised to find him a younger son -- one who decided he needed a profession and chose the Church, then had one year at King Williams's College 1847-8, perhaps to polish up his academic credentials for entry to university.