au pas gymnastique : ' At the double

78.1. un quinconce: A group of five trees arranged so that one stands at each corner of the square and one right in the middle. An indefinite number of such groups can be seen wherever trees are planted in alternate parallel rows.

78.2. Gros- Caillou : a quarter to the west of the Invalides.

78.3. est-ce que ça se demande ? ' Is that the sort of question that needs asking ? '