A walk in the park

We came across some "found art" - it says: Hole I, 2007. Roc Sandford. Air, earth, tarmacadam, water. Dimensions variable. Objet Troue. Provenance: studio of the artist.

There should be an accent over the e in Troue. Careful proofreading will uncover the (multilingual) joke.

The park was Kensington Gardens/Hyde Park, and there was a nippy wind ruffling the water on the Serpentine and moving the boats about.
The swans were unperturbed among the daffodils. Ah, spring!