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 Christopher explained the mistake, and it was corrected.

Malta at once asked if she could keep the Aquarium Cat's reply, if one came, to start an Autograph Collection.

After that the kittens hung about the post office until they almost wore out the letter-box opening it. They kept bothering Mrs. Breen by asking her if she was quite sure there wasn't a letter. She was almost tempted to write them one herself and put it in the box just to keep them quiet. You see, the Aquarium Cat was so surprised by the invitation that it took him some time to answer. At last a letter came, on official Aquarium notepaper which had little pictures of fish printed on it. It was very carefully written and punctuated. Evidently the Aquarium Cat had taken great pains:

The Aquarium New York, N. Y. July 15, 1927.

In reply to yours of the 8th inst., would say, am very pleased by your friendly invitation and accept same with pleasure.