So you mean, put all the addresses of "Canaria" to "Stockholm" wallet?

To get the keys, you can use either use dumpwallet "filename" or dumpprivkey "address" (example/syntax) depending on the number of addresses you want to keep.

To "import", you have a choice to just import the funds or import the addresses.

• To import the funds (discard the addresses), you can just send all the funds to your Stockholm wallet (you don't even need to export anything but it involves a transaction).
  
• If you prefer to keep all of the addresses, use importwallet "filename" (example/syntax).
  
• If you prefer to keep some of the addresses, just use importprivkey "private_key";
  refer to the documentation (menu on the right side in the link above) for the syntax, but I suggest to add "false" except for the last prv key.

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T;N: You won't be able to restore these imported addresses using the master private key (if you've exported it) or any old wallet.dat backups;
so make sure to make another backup after doing these steps.