Here's a short story:

CHAPTER XXIII. 

GUY IN LUCK. 





Guy Waring reached Waterloo ten minutes too late. Nevitt had gone on by the West of England express. The porter at the labelling place "minded the gentleman well." He was a sharp-looking gentleman, with a queer look about the eyes, and a dark moustache curled round at the corners. 

"Yes, yes," Guy cried eagerly, "that's him right enough. The eyes mark the man. And where was he going to?" 

"He had his things labelled," the porter said, "for Plymouth." 

"And when does the next train start?" Guy inquired, all on fire. 

The porter, consulting the time-table in the muddle-headed way peculiar to railway porters, and stroking his chin with his hand to assist cerebration, announced, after a severe internal struggle, that the 3.45 down, slow, was the earliest train available. 

There was nothing for it then, Guy perceived, but to run home to his rooms, possessing his soul in patience, pack up a few things in his Gladstone bag, and return at his leisure to catch the down train thus unfavourably introduced to his critical notice. 

If Guy had dared, to be sure, he might have gone straight to a police-station, and got an inspector to telegraph along the line to stop the thief with his booty at Basingstoke or Salisbury. But Guy didn't dare. For to interfere with Nevitt now by legal means would be to risk the discovery of his own share in the forgery. And from that risk the startled and awakened young man shrank for a thousand reasons; though the chief among them all was certainly one that never would have occurred to any one but himself as even probable.  (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Where did Guy run home to?
Guess: to his rooms

Question: What kind of bag did he have?
Guess: a Gladstone bag

Question: What was Guy's last name?
Guess: Waring

Question: Where did he arrive too late?
Guess: Waterloo

Question: Who was Guy asking about?
Guess: Nevitt

Question: Was he stylish?
Guess: He was a sharp-looking gentleman

Question: Where was he headed to?
Guess: Plymouth

Question: When was the next train scheduled to go?
Guess: 3.45

Question: What could Guy have dared?
Guess: he might have gone straight to a police-station

Question: Why?
Guess: and got an inspector to telegraph along the line to stop the thief

Question: What would happen if he took legal measures?
Guess: he would risk the discovery of his own share in the forgery

Question: For how many reasons did he not want to do that?
Guess: a thousand reasons

Question: Which train had Nevitt gone on?
Guess: the West of England express

Question: Who said Nevitt had a weird look in his eyes?
Guess: the porter

Now answer the following question in the same format.

Question: What did Guy say mark a man?

the eyes