How many siblings did Pearcy have?

Directions: Read the following passage and answer the question that follows.
                                 
“Father, I’m going to build a boat.”
“Build a boat! You couldn’t build a boat!”
There was no conviction in the father’s tone.
Puresh Roy, who was satisfied with himself, with all his possessions, and, above all, with his only son, in his heart believed that his son could do anything, just as he believed that he himself could do anything. Pearcy looked like his father. He had the same bright blue eyes, the same sharp nose, the same determined mouth. They both had a quick, eager way of speaking. “What is your plan?” asked Pearcy’s father. “Well, I’m going to build a boat in the barn. I’ll get some wood over at the sawmill. I saw some over there, which looked just right.”
“What kind of a boat?”
“No flat-bottomed punt, I tell you! I want one that will sail. I’ll build her with a keel and a rudder.”
“Have you made a sketch of it?”
“No, only in my own mind.”
“You want a carefully drawn sketch of it. I’ll help you.”