A Deduction

I walked in a hurry into the shop as rain poured out heavily,

To my delight I found Mr. Holmes right by my side surprisingly…

You’re a teacher he asked, as I wished him good evening,

I agreed with him enquiring how he knew when I had told him nothing…

He chuckled and said there’s ink on your wrist,

I said again but I could have been just a writer amidst…

He explained no that wasn’t possible because he had observed my lace,

It was stained with color paint which a boy had by mistake poured losing his pace…

I asked again that still did not answer my question,

He chuckled and densely claimed "oh so you don't believe my observation!"

I had to be the cat with curiosity and manage not to get killed! I firmly framed, why only a teacher?

He said meekly yes also because you happen to carry the children's folder…