Isabella Walker made 9 passages in her six month period, including one of 11 days from London to Hull (at the time of the Great Blizzard of 1891) and another of 13 days from Burry Port to Faversham (in a period of light winds, mist and fog). Ribblemere made 24 passages, 22 of them in a three month period, or some 5 times more voyages over a given time than the brigantine. Given that, it's surprising that sail survived so long in coastal waters.
My grandfather was on the Isabella Walker as Hugh Forrester, Ordinary Seaman. He was on the Ribblemere as Captain John Stevenson. Don't ask - but if you know why he changed his name please let me know. I know the family story, of course, but, so far, I have found nothing to either confirm or deny it.