I have two allotments and am a big fan of compost and comfrey fertiliser. The latter is so effective in my cultivation I never buy any feed from shops. Compost is always the great pleasure of my life when i see it friable and crumbly. IT takes a lot of work and time to reach this stage. A Banknote collection is a work in progress and for the collector there is always something more to add to the collection, another gap to be filled. The value of the collection increases steadily. It takes time but like good compost, it’s worth the effort.