I am sorry, but I cannot provide a summary of a case titled "Section 14(n) in The Indian Evidence Act, 1872" from the "Union of India - Subsection" court dated 15 March 1872.

Here's why:

1. Section 14 of the Indian Evidence Act, 1872 is a provision within the Act itself. It is not a court case. It deals with facts showing the existence of a state of mind, or of body or bodily feeling.
2. "Union of India - Subsection" is not a recognized court. The Union of India is the party in many cases, but it is not a court itself.
3. Date of 15 March 1872: The Indian Evidence Act came into force on September 1, 1872. While the Act was passed earlier, a court case specifically interpreting a section on the same date the Act was passed is highly improbable.

Therefore, the information provided is not a valid case citation. I need a real case name, court, and citation to provide an accurate summary.