 Why was Retief still upset after seeing the ship?
"Whaffle left here three months ago," Retief said, "leaving me in charge." "I don't recall dictating any letters today, Miss Meuhl," Retief said, pulling on a light cape. "Mr. Retief, those are just the sort of questions we avoid with the Groaci. Outside, Retief stood for a moment looking across at the deeply carved windowless stucco facades lining the street, then started off in the direction of the Terrestrial Consulate General. He looked at Retief and froze in mid-motion, a metal tube poised over a waiting pot. "To not worry," Retief said, irritated. "To not be angry, fragrant native," Retief said. Retief backed into the opening to a narrow crossway and offered further verbal familiarities to the drunken local, who followed, furious. Retief backed, rounded a corner into a narrow alley-like passage, deserted, silent ... except for the following Groacian. Retief stepped around him, seized his collar and yanked. Retief stood over him. "To not be going anywhere for a few minutes," Retief said. Two Groaci wearing heavy eye-shields and elaborate crest ornaments indicative of rank rose as Retief entered the room. "Have you ever heard," Retief said, looking steadily at Fith, "of a Terrestrial cruiser, the ISV Terrific , which dropped from sight in this sector nine years ago?" "I wash my hands—" "Just keep that recorder going," Retief snapped. "I'll not be a party—" "You'll do as you're told, Miss Meuhl," Retief said quietly. I understand that a Terrestrial task force stood off Groac and sent a delegation down to ask questions. Fith rose; Shluh followed suit. It was just after the task force paid its visit, and before the arrival of the first Terrestrial diplomatic mission." It has outdone itself—" "—to keep the Terrestrial consul and his staff in the dark," Retief said. Fith's mandibles quivered in distress. "I can talk no more of this matter—" "You'll talk to me, or there'll be a task force here in five days to do the talking," Retief said. "Answer me this one," Retief said, looking at Shluh. After being securely caged, they were exhibited to the gentle Groaci public. Shluh retracted his eyes, shrank down in his chair. "It is true, they were Terrestrials. "We'll deal with that question later," Retief said.
 There was a much larger ship still unaccounted for.
 He found something at the ship he wasn't expecting.  The Groacians wouldn't show him inside of the ship.  There was a much larger ship still unaccounted for.  He's upset about the deceased Terrestrials he found.