Chapter 17- Is Neil Green the mysterious man?

When Lisa came back to the hospital it was almost dark outside. She entered the ward and saw Linda Holmes peeling the oranges. There was no sign of Mark Holmes and Carl Black. 

She asked her mother, "Where is Dad?"

"Doctor asked to do some tests, so Mr. Black took him for the test." Linda Holmes kept peeling the oranges without sparing a glance at her.

Lisa was surprised. She wondered what test her father required.  Didn’t Dr. Valentine say that her father was fit for PCI?  She was a little worried, but she didn't show it to her mother. She only nodded and sat on the sofa beside her.

Carl Black and Mark Holmes entered the ward after around an hour. Mark Holmes was sitting in a wheelchair, and he was pushed in by a ward boy