Last September (2020) I took possession of my late father’s Parker ‘New Duofold’ Senior fountain pen, which I part covered at the end of this piece. A week back I went to use the pen to find the ink had evaporated, and on refreshing with a little water I then found it appeared to be leaking around the base of the sac. Or so I thought. The net result was some careful disassembly to discover the real problem, and then the repair. The work itself was simple enough so I will be covering it here as an example of why you should not necessarily be scared to do repairs such as this, and will also include the mistakes I made and the bullets I dodged.