From what I remember, Fougere Royale was probably pretty close to Penhaligon's English Fern or Geo F. Trumpers' Wild Fern. Mind you, this is a memory from over forty years ago, so it might not be completely accurate.
Houbigant was a great perfume house that only survives in name. You may still be able to get their products but they are not the quality they used to be. The examples that come to mind are Chantilly and Quelques Fleurs. The decline of the company is much like that of Coty.
And I don't think that Chanel's Pour Monsieur is much like Chypre. Again from the Sixties, I remember Chypre to be much stronger, less sweet and sharper than the Pour Monsieur.