Before the group left for Skyrim, they sent communications to their missing companions, Z and Naarean, telling them where they were going and that they should make their way to Whiterun, ideally via teleportation. Then, they all donned disguises, making them look like nobles, and came up with fake names. The reason for this was to make them inconspicuous once in Skyrim, just in case their target had spies looking for his enemies. Then they paid their ticket and travelled to Whiterun via Wayshrine, under the new name of the Historians and Antiquarians Society.
Once in Whiterun, the group stabled Apollo and the carriage, stowing the Grummite prisoner they carried over from the Shivering Isles into the Back of Holding that Hisskär purchised. When Z arrived, she waited for a while along with a hooded friend of hers she brought along, and Naarean arrived a moment later along with Bralen, the cultist who had befriended the group. Once the group had reconvened, they updated each other with what had happened to them while separated, and then, the group split up and used their different methods to gather information about their main objective at the moment, the removal of the rogue Imperial General in Markarth, as well as chasing some personal goals on the side.
Whatever the group does however, they had now arrived in Whiterun, a politically neutral city which had grown to surpass any other city in Skyrim, and perhaps Tamriel, in terms of economy and technology; a massive melting pot of a society at the center of a highly politically tense region.
