It's been only about 2 weeks since I bought my Greenspeed Anura and I already had a flat tire yesterday. This morning I set to work to do something I hadn't done in maybe 40 years. In fact, although I have faint childhood memories of watching the neighborhood kids repair their bike tires, I don't recall if I ever repaired a flat of my own bike. Relying on those distant teachings, information I had printed from the Internet from this site and the live advice given by my good friend Ümit via cell phone, I tackled the problem like a true novice and overcame it in just about 2 hours, which includes the time spent taking photos and talking on the phone.
Thanks to Ümit's insight, I was able to repair the inner tube without removing the front tire.
Part of the reason why it took so long was that the "offending substance" turned out to be a minuscule piece of metal protruding from the inside of the tire; I could feel it with my finger, but not really see it.
Its removal required one of my dissecting forceps and the magnification provided by a 7x Hastings triplet. Here it is on the palm of my hand. It was 2 mm long and barely a quarter of a millimeter wide, but strong enough to create a pin hole thru the inner tube.
The inner tube has now been patched up and the trike is back in working condition. If the tire remains inflated, I will take it out for a ride this afternoon.
Until the next episode, peace be upon you.