“Murder?” Oyama frowned in surprise and disbelief. Low exclamations rose among the spectators. “With all due respect to Lord Matsudaira, that can’t be. Ejima fell off his horse during the race. I saw. I was standing by the finish line, not five paces away from him when it happened.”

“He seemed to faint in the saddle just before he dropped,” said a spectator. “It looked as if his heart had suddenly given out.”

Sano saw heads nodding, heard murmurs of agreement. Contradictory feelings beset him. If these observers were correct, then the death wasn’t murder, the other three probably weren’t either, and his inquiry would be short. He felt a letdown coming. Then he reasoned that at least this would mean the regime was safe, and he would be glad to put Lord Matsudaira’s fears to rest. But for now he must keep an open mind.

“My investigation will determine whether Ejima was a victim of foul play or not,” Sano said. “Until it’s finished, this is a case of suspicious death. The racetrack will be treated as a crime scene, and you are all witnesses. I must ask you all to remain here and give statements about what you observed.”

He saw irritation on the men’s faces. He sensed them thinking that Lord Matsudaira was too quick to see evil schemes everywhere and that he himself was wasting his time as well as theirs. But no one dared argue with the shogun’s second-in-command. Sano reflected that his new status had its advantages.

“Fukida-san, you start taking the witnesses’ statements. Marume-san, you come with me,” Sano told his men.

The thin, scholarly, serious detective began herding the crowd into a line. The brawny, jovial detective accompanied Sano as he strode along the track. The racetrack master followed them. As they neared the body, the soldiers surrounding it stepped aside. Sano and his companions halted and looked down at the dead man.

Ejima lay sprawled on his back, his arms and legs bent, against a wide, smudged black line painted across the track. His iron helmet covered his head and face. Sano could see his eyes, dull and vacant, through the open visor. Ejima’s metal armor tunic was dented. Blood and grime stained his blue silk kimono, trousers, white socks, and straw sandals.

“He looks like he’s been beaten,” Marume said.

“The horses trampled him,” Oyama explained. “He fell right under their hooves. It happened so fast, and the other riders were so close behind him, there was no time for them to steer clear.”

“At least he won his last race,” Marume said.

“Has his family been notified of his death?” Sano asked Oyama.

“Yes. My assistant went to tell them.”

“Did anyone touch him after he fell?” Sano said.

“I turned him over to see how badly he was hurt and try to help him. But he was already gone.”

“Has the track been cleaned since he died?”

“No, Honorable Chamberlain. When I sent the news to Lord Matsudaira, his troops came and brought orders that nothing was to be disturbed.”

Sano felt hindered by the troops, who lingered too close, waiting to see what he would do. “Wait over there,” he told them and Oyama, gesturing down the track.

When they’d moved off, Sano said to Marume, “Supposing Ejima didn’t die of a bad heart, the fall could have killed him. But then the question is, what caused the fall?”

“Maybe someone in the stands threw a rock at him, hit his head, and knocked him unconscious. Everyone else there would have been too busy watching the race to notice.” Marume paced around the body, kicking at a few stones that lay scattered on the dirt. “One of these could be a murder weapon.”

Sano listened to sporadic gunfire that emanated from the distant martial arts training ground. He rotated, looking beyond and above the track. Soldiers peered down at him from windows in covered corridors and watchtowers atop the walls that enclosed the compound and rose up from the slope higher on the hill. “Someone up there could have shot a gun at Ejima.”

“Who would have noticed one more shot?” Marume agreed.

“I don’t see a bullet wound on him, but he could have been hit on his helmet and stunned.” Crouching, Sano examined Ejima’s helmet. Its metal surface was covered with scratches and dents.

“I’ll have the area searched for a bullet,” Marume said.

“In any case, the witnesses aren’t limited to the people inside the compound when Ejima died,” Sano said. “We’ll have to round up all the soldiers who were on duty anyplace with a view of the racetrack. But first I want to question the other witnesses who were closest to Ejima.”

He and Marume walked over to the racetrack master.

“Are you finished inspecting the body?” Oyama asked. “May I have it removed?” He sounded anxious to rid his domain of the physical and spiritual pollution conferred by death.

“Not yet,” Sano said, because he needed a more thorough examination of the corpse than could be done here, and he didn’t want it whisked off for the funeral and cremation. “I’ll take care of its removal. Right now I want to talk to the riders who were in the race with Ejima. Where are they?”

“In the stables,” Oyama said.

Inside the long wooden barns with thatched roofs, horses stood in stalls while grooms washed and wiped them, combed their manes, and bandaged wounded legs. Manure and hay scented the air. The five riders squatted in a corner, conversing in low voices. They’d stripped oft their armor, which hung on racks that also held their riding gear. When Sano approached them, they hastily knelt and bowed.

“Rise,” Sano said. “I want to ask you some questions about Chief Ejima’s death.” He observed that the riders were all robust samurai in their late twenties or early thirties. They were still grimy from the race, and reeked of sweat. As they rose, he said, “First, identify yourselves.”

Among them were a captain and a lieutenant from the army, a palace administrator, and two distant cousins of the shogun. When Sano asked them to describe what they’d seen during the race, the army captain spoke for them: “Ejima crumpled in his saddle. He fell off his horse. Our horses ran him over. By the time we’d stopped and dismounted, he was dead.”

This matched the story told by the spectators. “Did you see anything hit him before he crumpled?” Sano said. “Such as a rock or a bullet?”

The riders shook their heads.

“Did you touch Ejima?”

They hesitated, eying one another with uneasy expressions. Sano said, “Come on. I know that horse racing is a rough sport.” He moved to the rack and fingered a riding crop, which consisted of a short, stout leather whip with an iron handle. “I also know that the horses aren’t the only ones to take the brunt of these. Now speak up.”

“All right. I hit him,” the captain said reluctantly.

“So did I,” said the lieutenant. “But we were just trying to slow him down.”

“We didn’t hit him that hard. He got me a lot worse than I got him.” The captain gingerly touched his face, which was swollen around his jaw.

“We play rough, but we never intentionally hurt a fellow rider,” said the lieutenant. “That’s the code of honor at the racetrack.” The other men nodded, united against Sano’s implied accusation. “Besides, he was a friend. We had no reason to kill him.”

“Although I bet that a lot of other people did,” the captain said.

Sano thanked the men for their help. As he and Marume walked away from the stables, Marume said, “I think they’re telling the truth. Do you believe them?”

“For now,” Sano said, reserving judgment until evidence should indicate otherwise. “The captain was right when he hinted that Ejima was a good candidate for murder.”

“Because he was one of Lord Matsudaira’s top officials?”

“Not only that,” Sano said. “His position made him a target. He headed an organization that spies on people.”

No one was safe from the metsuke, especially in this dangerous political climate, when a man’s most innocuous words or deeds could be twisted into evidence of disloyalty to Lord Matsudaira and cause for banishment or execution.