It is not uncommon to see Bijou recipes with equal parts gin, Chartreuse and rosso vermouth, as called for in Harry Johnson's Bartender's Manual. Indeed...
Yes, you're right, I'm sorry! I did not notice that my copy only has the cover from the 1882 edition, and it is already further written that this is the 1934 edition. I'm sorry, thanks for the reply!
https://euvs-vintage-cocktail-books.cld.bz/1882-Harry-Johnson-s-new-and-improved-bartender-s-manual-1882/8/