You have your grains in a sieve so just put more sugar into the 1.5 litre Kilner jar and add 1 litre water. Stir once again until the sugar has dissolved into the water and add grains to jar.

Jeremy was aware that one of his forebears had invented the Kilner jar, a receptacle for preserved fruit that is still popular in homes today. But he was completely unaware that the story of the ...