Be very cautious about assuming that this couple were married in the kirk building. Just because they were married in the parish of Drumelzier does not mean that the wedding took place in the kirk. In fact, the probability is that it did not. The usual place for a wedding ceremony was the bride's home, or, if she had no parents or was married a long way from home, in the manse or in her employer's home. Kirk weddings were very much the exception rather than the rule until the last decade of the 19th century, when it began to become more popular to marry in a church, or in a hotel, restaurant or hall.
Church weddings were more common, but by no means universal, among adherents of the Roman Catholic, Episcopal and (after the 1840s) one or other of the free churches.
For my own tree, I have seen and transcribed the details of 881 marriages in Scotland between 1855 and 1890*. I looked more closely at the data, and only 30 (3.4%, or one in 29) of these couples were married in a church building: 13 in an Episcopal church, 10 in a Free church, one in a Roman Catholic church, and just 6 in a Church of Scotland parish kirk. That's fewer than 1%, or one wedding in 146, taking place in a parish kirk.
*Unfortunately the pre-1855 parish registers almost never state exactly where a wedding ceremony was held, so it is not possible to do a similar analysis of information from the 1790s.
Statistically speaking, I have to add the caveat that my sample of 881 marriages is not random, in that it consists entirely of people related to me. Someone with Irish ancestors, for instance, might have a higher proportion of Roman Catholics in their tree, so the results would look rather different, but it would still show only a tiny proportion of weddings being celebrated in a Church of Scotland parish kirk before the late 19th century.
