Thank you for that image Wolfgang. It clearly shows the pigeon release controller was in the sunken pill-box.

I edited the beginning of this thread with my belief, of which I have no definitive proof, that some time after 1898 (by the dated illustrations in magazines) and 1901 (by a dated postcard) that a new clubhouse, platform and pigeon ring were constructed.
This would be the old clubhouse and ring

[Linked Image from photos.smugmug.com]

This is a General Plan dated 1879 which unfortunately does not show the extension of the casino complex toward the cliff/bay nor the original clubhouse/pigeon ring

[Linked Image from photos.smugmug.com]

A small image but it does show the elevated walkway over the Monaco Train Station (finished in 1868) tracks below the casino and Grande Terrasse, with the clubhouse and ring below

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]

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