The interpretation timeline
2 John 1:12 Douay-Rheims

Having more things to write unto you, I would not by paper and ink: for I hope that I shall be with you, and speak face to face: that your joy may be full.

1714 – 1871 4 witnesses

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“The apostle concludes this letter, 1. With an adjournment of many things to personal conference: Having many things to write unto you I would not write with paper and ink; but I trust to come unto you, and speak face to face, that our joy may be full. Here it is supposed that some things are better spoken than written. The use of pen and ink may be a mercy and a pleasure; but a personal interview may be more so. The apostle was not yet too old for travel, nor consequently for travelling service. The communion of saints should be by all methods maintained; and their communion should tend to their mutual joy. Excellent ministers may have their joy advanced by their Christian friends. That I may be comforted together with you by the mutual faith both of you and me, Rom 1:12. 2. With the presentation of service and salutation from some near relations to the lady: The children of thy elect sister greet thee. Grace was abundant towards this family; here are two elect sisters, and probably their elect children. How will they admire this grace in heaven! The apostle condescends to insert the nieces' duty (as we should call it), or dutiful salutation, to their aunt. The duty of inferior relations is to be cherished. Doubtless the apostle was easy of access, and would admit all friendly and pious communication, and was ready to enhance the good lady's joy in her nieces as well as in her children. May there by many such gracious ladies rejoicing in their gracious descendants and other relations! Amen.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Having many things to write - That is, I have many things that I might write to thee, but I think it best not to commit them to paper, because I hope to visit thee shortly, and speak fully of those matters, which will be a means of increasing the comfort both of thee and thy family, as well as my own. There is more comfort in mutual interviews among friends than in epistolaty correspondence,”
Source
1871
A.D.
1871
“I would not write--A heart full of love pours itself out more freely face to face, than by letter. paper--made of Egyptian papyrus. Pens were then reeds split. ink--made of soot and water, thickened with gum. Parchment was used for the permanent manuscripts in which the Epistles were preserved. Writing tablets were used merely for temporary purposes, as our slates. face to face--literally, "mouth to mouth." full--Greek, "filled full." Your joy will be complete in hearing from me in person the joyful Gospel truths which I now defer communicating till I see you. On other occasions his writing the glad truths was for the same purpose.”
Source

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“Having more things. Understand that this admonition will be most useful to you, since for its confirmation I have determined also to come to you; and yet in the meantime I could not be altogether silent.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.