Fun and games with alt-text

I'm trying to get into the habit of writing descriptions of my prints, to make them more accessible. It's surprisingly hard. For example, for this gorgeous nursery print by K J Fricero, I've written "Two little girls dressed in late18th century clothes. One is playing a banjo, one is dancing, with a little dog." I wanted to put "mandolin", as I thought it would fit the period that Fricero is suggesting, though it plainly isn't a mandolin, but banjo doesn't feel right, does it? Sounds more like a hoe-down. These artists - playing with history, but what you gonna do?