From the story 愛の鍵 by 星新ー:
One person's phrase to open the lock was to say "The tulips have bloomed". There was also one which said "You must make it secure". Among them, there was, for example, "The ears of a king are the ears of a robber".
The story seems to be describing locks shaped like ears that people unlock by whispering phrases into them.
I cannot understand the meaning of こった in the second sentence. Maybe 請う would fit with the quotative particle, but the dictionary says that this means 'ask' which doesn't really seem to fit the context.
More generally I'm having trouble with the the two の particles marked in bold. In と言うのもあった is の a pronoun describing a person or a phrase, i.e. is it 'there was one person who said ' or 'there was one phrase which said'? My guess is that it matches with the の in ある人のは, so it is one person with two phrases. Likewise I'm struggling with the の in こったの.