Clarke & Clarke Secret Garden Leiden Coral WallpaperClarke & Clarke Secret Garden Leiden Coral Wallpaper. Leiden evokes a folk style in the drawing of these beautiful botanicals, a nod to its namesake, The Hortus botanicus Leiden, the oldest botanical garden in The Netherlands. This is a modern take on an old world design where the lovely spacing of each flower and plant gives way to a soft ground, with some pastel notes. * Brand: Clarke & Clarke * Wallpaper Collection: Secret Garden * Wallpaper