Under the Mikado's Flag by Edward Stratemeyer

Now that Gilbert was about to leave Port Arthur he was anxious to see what he could of the preparations for war, and when he left the furniture shop at dark he did not move directly for Herr Schaumberg's hotel, but took a circuitous route which brought him near to some of the forts.

That the Russians were doing all in their power to render the port safe against an attack there could be no doubt. Every fort was being strengthened, and from the talk of some soldiers he learned that some hills behind the town were likewise being fortified.