The linked publication states: “Colin Robertson commented in September 2018 The Dirk Dance was bought by Tom Flett who passed on to John Wesencraft who in turn passed the dance on to Jane Harrison, daughter of Tom and Joan Flett. The reason for all the passing on was that Mrs MacNab insisted that the dance should only ever be known by two living persons at any one time (Great way to preserve a Heritage). This was the agreement that Tom took with the dance, but when Tom died Joan did not feel obliged to maintain that agreement and published the dance in Traditional Step-Dancing In Scotland in 1996.”