...anyway, Nicholas had said that he had used an entrance in the vicinity of the bookshop but nobody could find it...and yes, I can remember, now....and so what had he meant?

https://www.google.com/maps/place/La+papeterie+latine/@48.8472409,2.3412572,3a,75y,90t/data=!3m8!1e2!3m6!1sAF1QipPD2I_TIr9LpHGw7zRM1tc-3hEz9gZ5Ko59e0q1!2e10!3e12!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipPD2I_TIr9LpHGw7zRM1tc-3hEz9gZ5Ko59e0q1%3Dw114-h86-k-no!7i3264!8i2448!4m5!3m4!1s0x47e671dd22235783:0xb339eeb35995817f!8m2!3d48.847445!4d2.3413655