I've broken or simply run out of thread.
Everyone that hand sews will eventually come across this problem. Sometimes it's impractical to pull all the thread and start over. A really long running stitch while saddle making is one example.
There is a very good way of dealing with it. Al Stohlman covers it in one of the books I've got. A "normal" repair would irk me too, but Al (or his wife) never measured out thread. They didn't have the luxury of the high end threads that we have right now either. They regularly "fixed" the issue and it really works well. Kinda hard to write it without pics but maybe one of the elders can elaborate if words fail me.
So... Your thread broke. (I'm assuming you are doing a regular two needle harness stitch)
Back out two or three stitches so that you have a little length on each side.
Take the two ends and tie them together nice and snug. This means that you'll have a knot over the welt (or edge or whatever).
Now you have nice stitch up to the point of the break then the ends are knotted together.
Rig up your needles like normal.
Now thread your needle and thread through the hole before the last hole. Meaning, the hole before the one that now has the tied knot.
Finish sewing the project.
Once you're done simply cut off the tied knot (and the extra length) in the channel. Be careful not to damage the surrounding thread.
Drink a Pepsi.
I have broken down entire sheaths due to a broken or short thread. I'll never need to do that again!
If the explanation above doesn't make sense hunt down a copy of "The Art of Hand Sewing Leather". There is a wealth of great information on every page. Some I thought didn't pertain to me and what I do, but I find myself doing all manor of stuff that I never planned on, like making a masseuse's oil holster belt for my sis. People find out that you work with leather and they ask for all kinds of things!
