You have done well in letting more air and light at your walks. Sprinkle them with salt twice a-year. The salt will destroy the moss, and it can be brushed off with a hard broom. We fear we do not quite understand your other question. Our correspondent's "hints" have been very comprehensive, and treat of the great bulk of vegetables in cultivation. But of late, you will observe that directions for vegetables have been transferred to the Kitchen-Garden department in Calendar. Thanks for your good wishes. All the leading firms in Scotland can supply Perennial plants. We cannot recommend individual firms.