Hi Kim, I've just been reading the Statement of Historical Significance for the castle (via
https://www.historicenvironment.scot/visit-a-place/places/lochmaben-castle/ - link at the bottom of the page) which states that the castle was allowed to fall into ruin after 1603 and was being used as a local quarry by the 1700s (page 5 of Statement) . I've also had a quick chat with the Scotland Project co-leaders and given that James Hope-Johnstone wasn't born until 1741 we don't think it's worth creating a category.