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There's no place like Home
After the discussion on the beach, you're welcome back at the Guild! For a while, Diglett examines your footprints, getting extremely nervous and excited that you and your partner are back at the guild. Immediately, there is an uproar and everyone goes out to greet you, and how it's been such a long time. Your partner actually begins to cry, and everyone in the guild (including Diglett) goes to discuss matters with you.
After sleeping, Torkoal, by the Guildmaster, is allowed in. Torkoal comes in and talks about a certain pattern, and how that's how you make it to Hidden Land, a place where Time Gears are meant to be. Everyone eagerly awaits some more answers, however in his old age Torkoal is very forgetful, causing everyone to be brought down, and how maybe Torkoal can remember it later. Apparently he asks you to go to Steam Cave, however it is a lot easier now that you are much stronger.
Continue to Chapter 18.