Agastache is also known as Hyssop and has many medicinal, herbal and culinary uses.
Marion’s cycling group are known as G5. I’m going to suggest some hyssup oil for them. In the coffee! Hyssop is known also as Ysup, Herbe de Joseph, and Herbe Sacré. Great for cyclists in appropriate doses.
Lismore Castle is owned by the Duke of Devonshire. No connection to the Hyssop family. Due to other commitments, I was unable to meet him. The current 12th Duke is Peregrine Cavendish. The family seat is at Chatsworth House in Derbyshire, and the heir is Lord Burlington (William Cavendish), who is regularly in Lismore. According to regulations the heir must be male. There’s also the important matter of legitimacy.