Mentioned several times in Neatby, he was an attendee at the Powerscourt conferences, and also one of the 5 men who investigates charges against BW Newton at Plymouth.
A symptom of the same general condition was a tendency to a kind of Pentecostal communism. It is related of one of the Brethren — Sir Alexander Campbell, if I mistake not — who had property in the West of England, that he insisted on his servants sitting down with him at table. One day, coming in late for dinner, he found that his servants had already made some progress with the meal. They explained that, as he was so late, they thought they had better begin without him.
A full account of his life can be found in Timothy Stunt's S'ir Alexander Cockburn-Campbell (1804-1871): A Biographical Note' in Brethren Historical Review xii (2016)
He built a chapel in Exeter in 1840, modeled on Ebrington Street in Plymouth. Later that decade he moved to Barnstaple where he seems to have become disillusioned with Brethrenism. Around 1855, he moved his family to Europe and settled at Heidelberg. In 1858 he moved again, this time to Western Australia! His wife remained in Europe though, and there is some mystery over the circumstances of his emigration. His wife also seems to have maintained her association with the Brethren.