Introduction:
Mr. Nath is a character in the story "Expert Detectives," which is a part of the NCERT English Class 7 textbook. He is portrayed as an intelligent and observant individual, who plays a significant role in solving the mystery in the story.

Observant and Analytical:
Mr. Nath is known for his keen observation skills and analytical thinking. He notices even the smallest details and is able to connect them to form a bigger picture. For example, when he visits the crime scene, he carefully examines the broken lock, the footprints, and the missing items, which eventually leads him to uncover important clues.

Knowledgeable:
Mr. Nath possesses a vast amount of knowledge on various subjects. He is familiar with different types of locks and their mechanisms, which aids him in understanding how the burglary might have taken place. His knowledge also extends to other areas, such as history and geography, which he uses to draw insights and find connections in the case.

Problem-Solver:
Mr. Nath is a natural problem-solver. He possesses a logical and rational mindset, which enables him to think critically and solve complex puzzles. He approaches each challenge with a systematic and methodical approach, breaking down the problem into smaller parts and analyzing them individually. This allows him to unravel the mystery step by step.

Resourceful:
When faced with limited resources, Mr. Nath utilizes his creativity and resourcefulness to overcome obstacles. He makes use of the available tools and materials to recreate the crime scene, enabling him to retrace the steps of the culprit. His resourcefulness helps him gather crucial evidence and build a solid case against the thief.

Conclusion:
In conclusion, Mr. Nath is a highly intelligent, observant, and knowledgeable character in the story "Expert Detectives." His ability to analyze situations, solve problems, and utilize available resources makes him an expert detective. He plays a pivotal role in unraveling the mystery and serves as an inspiration for readers to develop their own analytical and problem-solving skills.