Step 1: Charley's description of the Grand Central.
Charley describes the Grand Central as undergoing rapid growth and development. He notes how it is becoming larger and busier due to increasing urbanization. The area around it is being transformed with new buildings, road extensions, and infrastructural improvements.
Step 2: Key aspects of growth.
The growth of the Grand Central includes more people, increased activity, and newer facilities. The urban development surrounding it also contributes to its expanding influence in the city.
Step 3: Charley's perspective.
Charley feels a sense of awe at how quickly the area has changed, with more infrastructure and crowds now present. This growth is a reflection of the city's expanding needs and the importance of Grand Central as a key hub.
Final Answer: \[ \boxed{\text{Charley described the Grand Central as rapidly expanding with new developments, more people, and improved infrastructure to meet the growing demand.}} \]