In addition to SPQR's description that docketing can contain all sorts of information the recipient desired to note, the docketing often supplies a YEAR date not otherwise in the postmark or contents.
Senders sometimes add notations too. Correspondences in the 1800s were often numbered internally or externally by the sender so the recipient would know if a letter had not arrived, etc.
And, I'll add,
ebay descriptions are often very poor sources of accurate postal information, which can lead to bargains too.
Posted 04/19/2020 10:51 am
