How are hair sporrans constructed?

[Tobus]

5) by the 1840s, due to wanting longer hair sporrans, horsehair was being layered over the goat-hair resulting in the modern horsehair sporran. Also, our modern all-metal cantles appeared. They were merely decorative. The leather bodies on these new horsehair sporrans weren't pouches, rather they had a leather pocket sewn on the back, closed with a button. These long hair sporrans were the standard sporran in all modes of Highland Dress (military dress, civilian Day Dress, civilian Evening Dress) throughout the Victorian period.

Indeed, that is an apt description of my Queen's Own Cameron Highlanders levee sporran from the late 1880s or early 1890s. Solid metal non-functioning cantle (gilt brass), with the simple pocket on the back and buttoning flap closure.

What I'm unsure of is whether there's goat hair under all that horse hair. It's rather delicate and I haven't pulled the horse hair back enough to try to see what's below. But from what I see around the edges, I don't see any indication of goat hair beneath. Would you happen to know if these had goat hair, or if they were just horse hair over leather? As horse hair sporrans go, the hair is quite long. I wonder if it was all connected at the top under the cantle, or if there were multiple layers of hair bundle attachments further down.