Spoilers ahead for all of the published Outlander books and the Daily Lines for Go Tell the Bees That I Am Gone.

A Fraser-MacKenzie family reunion was promised at the end of Written in My Own Heart's Blood. But there was one time-traveling MacKenzie notably absent. Buck will be in Go Tell the Bees That I Am Gone, at least based on the excerpts — a.k.a, "Daily Lines" — that author Diana Gabaldon has released. But when it comes to Roger's great-a-few-times-over-grandfather, William Buccleigh's story may only be told through flashbacks to provide backstory. So it's a good thing that backstory is a pretty juicy one.

With seven months to go before Go Tell the Bees That I Am Gone (Bees) is published, fans of the Outlander book series may take one of two routes — obsessively comb over all of the Daily Lines that Gabaldon has provided or avoid any potential spoilers like the plague. This article is for the fans in the former category, so be warned.

A Daily Line called "Hula Hoop" shared back in January 2016 was a Bees excerpt that features Buck. In the passage, Buck has stolen a small sapphire and gives it to Roger, presumably to help him time travel. Jemmy and Mandy are also in the scene and Jemmy plays with a hoop with a local child. But when Mandy picks up the hoop, puts it around her waist, and proclaims it's a hula hoop, Roger and Jemmy are just the teensiest bit concerned about her anachronistic reference. Buck may not know what a hula hoop is, but he does know that the lot of them (like him) are time travelers. So Roger and Jemmy's reactions seem to be more about the other people in this time period overhearing... which could be an ominous sign that the Roger and Bree's littlest one may have an issue keeping their time-travel secret intact once the family is back on the Ridge.