After the breakthrough

As happy as Dr. Hall was about the breakthrough in Sylvester Crowley's case, where he finally knew when the instances of trauma had occurred and how the split personalities had emerged, there was still one more personality left. 

Marcello Hatter. 

"Do you know when Marcello appeared?" Dr. Hall questioned in his seat. 

"Now that's a tricky question, doc," Ricardo said, crossing his legs. "I don't know."

"What do you mean? Was he born before you and Agnes?"

"What I mean to say is that I don't know. No se," Ricardo responded with a shrug of his shoulders. "We didn't know he existed until one day Agnes went out and ate ice cream. He was just there."

"May I speak to Marcello?" Dr. Hall asked for permission, while keenly staring at Ricardo as if questioning if there was a case where only one alter commanded when the other alters could get their turns to appear.