Paper By 4¢ Jackson Of 1883

No, no, no. The transition from rag to wood pulp based paper starting in the in the late 1870s to 1893 is well documented in the literature. The Columbian Exposition issue of 1893 is reported to have been the first US issue with 100% wood pulp paper. It should also be noted that the Bank Note companies used multiple paper suppliers, so it is not surprising to find mesh differences, not recognized or recorded in the Scott catalog.

Clark

Clark, for goodness sake, what do you think the words "composition of the slurry" refer to?
The reference to linen here has to do with the construction of the Fourdrinier wire itself.

As for the transition to wood pulp based paper, I don't know when that actually started, but it wasn't in the late 1870s as many philatelic students (including Roy White) had supposed. The recent study by Barwis established by analytical means that the principal fiber content remained at cotton throughout the period corresponding to the contracts of 1877 and 1881.

No need to get excited.