Wow - I cannot believe it is done! And done with 190 beads in the final round. I ever delighted I got through it; it was sure touch and go at times.
The final size is just over 11 inches in diameter, tatted in #40 Cébélia.
This Mystery Doily is quite an interesting challenge for anyone bored with the usual fare in the realm of tatting patterns. It is very repetitive, and the pattern can be memorized easily, but careful attention must be paid to every repeat, or there is a lot of un-tatting to do. Believe me on this point!
Thanks for all the the support, tatters, especially Jon and Frivole, who put up with a lot of groaning and panicky emails; they gave me much-needed help along the way.