Dear Mother,
J’Zhirr sees a structure surrounded by ghosts. When he goes near it, they suddenly turned into mistmen. With Serana‘s help, he makes short work of them.
Now that the enemies are disposed of, J’Zhirr takes a look at the structure. Right in the center is a pedestal, on which sits a horse skull. Might this be the horse that J’Zhirr is tasked to find?
Postcards from Skyrim 