In reply to Philip:
A rectangle - dimensions twice the height of the cake and half the circumference; cut in halves to make 2 rectangles the same height as the cake. Smear sides of cake with apricot jam and attach the rectangles butt joining the edges so no bulges. Roll remaining marzipan into a crcle the size of the top so it goes over the side marzipan. Spread top with jam and smooth on top piece.
I used to make my cake in the last week of October, then feed it with rum and/or scotch every couple of days until the end of November, then marzipan it, let it dry a week or so then ice it!!! Enjoy!!