[This is final part of my series. Not recommended for those who haven’t read other parts of story yet. And sorry it's very long but it took more words to explain the mystery. And yes after knowing the truth please don’t comment the real criminal in previous parts of story ]

14 March 2016

After the meeting, I went to her house. I plucked a rose from the garden and rang the door bell. She opened and said, “Oh Mr Lenoir, please step inside.” I entered and said, “Thank you Nurse Heklin.”

She asked me to sit near dinner table where mugs were arranged. I put rose in one of them. She said, “As you said, you are coming, so I thought I'd make us a cup of tea.”
She brought kettle from the kitchen, took mug to pour tea and said, “So what you wanted to tell me Mr Lenoir.”

“Well Nurse Heklin, I have come to return your formulary. But the truth is I also wanted to ask you something.”
“What's it Mr Lenoir?”
“You were pricked by a thorn of rose in your garden.”
“Yes.”
I showed her rose and said, “But as you can see this is Zephirine Drouhin variety of rose, which is pure thornless.”

She was surprised and said, “Well then it might be a nail from the trellis. It was sharp enough that I thought it was a thorn.”
She gave me cup of tea and poured for her.
I then asked, “Tell me do you have a daughter?”
“I think it will be better if few things be secret”, she replied.

I drank the tea and said, “She was your illegitimate daughter, I believe.”
She was again surprised and said, “How’d you discovered these things.”
“The truth is I tried to figure it out myself but I didn't get enough facts to prove it.”
“Yes you are quite right.”

“Well I had quite success in finding your real name. Your name is not Emily Heklin. It's rather Emily Hall which in whole case everyone referred to Mrs Hall...”

I laughed and continued, “...Oh poor Alicia and Mr Brown. They had no idea who you really...