Another instance I have heard of at Calder, where the same Mr Carstairs officiated for Mr Melvin, who had been taken with a fit of sickness during the sacrament, while they were singing part of the 24th Psalm, ‘Ye gates lift up your heads,’ &c., before the blessing of the elements, there was a mighty melting of heart seized the congregation, and the Spirit of God, like a mighty wind, burst open the everlasting doors, and took possession of the hearts of sinners; several people from that day dating their first soul-concern and conversion. I have heard Mr Carstairs used to say, he had three days of heaven upon earth, and one of them was at Calder.
Gillies Historical Collections Volume i 1756.