What tool does Gulliver use to spy on the Blefuscudians?

Gulliver uses a pocket telescope to spy on the Blefuscudians. This choice is significant because the pocket telescope is a compact and portable instrument, allowing Gulliver to observe the activities of the Blefuscudians from a distance without being detected. The story emphasizes the ingenuity and practicality of this device, as it aligns with Gulliver's character as a resourceful traveler.

While other options like a regular telescope, a spyglass, or an opera glass might also be used for viewing distant objects, they typically suggest larger or less portable designs. For example, a regular telescope is often bulky, making it less suitable for discreet observation. A spyglass, while similar in function, usually refers to a longer, more cumbersome tool traditionally used at sea. An opera glass is designed for viewing performances at theaters and is not primarily intended for long-range observation, making it less relevant in the context of Gulliver's spying.

Gulliver’s use of the pocket telescope highlights the practical adaptations he makes in his adventures, illustrating both his curiosity and the necessity of remaining undetected in the unfamiliar territory he explores.