Final answer:
The ink's location in the boy's room on the first night is unknown.
Step-by-step explanation:
The question is asking where the ink rested in the boy's room on the first night. Based on the given information, we don't have specific details about the ink's location. The passage describes a large writing-table with miscellaneous letters, papers, musical instruments, and books, but nothing to excite suspicion. Therefore, it's unclear where the ink specifically rested. The answer to the question is unknown.