1 Based on the way the Antiquary and Lovel react at the end, the reader can conclude that B Dousterswivel is planning on taking advantage of some of these people.
2 The definition that best matches the use of the word license in paragraph 11 is G Definition 2.
1 Based on the final paragraph, Lovel says, "He's a deep rogue, this Dousterswivel," and the Antiquary replies, "I'll warrant him a knave." This suggests they are suspicious of his intentions and believe he might be planning to deceive someone for personal gain.
2 Paragraph 11 states, "The Antiquary, whose curiosity was highly excited, and who, like all men who have a faith in their own talent for observation, was willing to be duped by a little ingenuity, readily granted a license to proceed." The word "license" in this context refers to permission to act (definition 2), specifically granting Dousterswivel permission to continue his act of finding water.