Ralph Waldo Emerson? Karl Blind? Carolyne Larrington? Wisdom of the Edda? Scandinavian Proverb? Anonymous?

Question for Quote Investigator: A friendship endures when it is nurtured and periodically renewed. Silence and distance cause a friendship to decay. The following adage expresses this viewpoint:
Go often to the house of thy friend, for weeds soon choke up the unused path.
This statement has been attributed to transcendentalist philosopher Ralph Waldo Emerson, but I have never seen a solid citation, and I have become skeptical. Would you please explore the provenance of this expression?
Reply from Quote Investigator: QI has found no substantive evidence that Ralph Waldo Emerson crafted this saying. He died in 1882, and he received credit by 1921.
The earliest match in English found by QI appeared in 1878 within an article titled “The Ethic Ideas of the Edda” by Karl Blind which was published in “The University Magazine” of London. Edda designates a collection of Medieval Icelandic literary works. Blind printed the following verse from a work called “Hávamál”. Boldface added to excerpts by QI:1
If thou hast a friend whom thou well canst trust:
Go often to him for friendly talk!
For brushwood grows, and very high grass,
On the path which nobody treads.
A different translation of the verse by Carolyne Larrington appeared in the book “The Poetic Edda” from Oxford University Press in 2014:2
I advise you, Loddfafnir, to take this advice,
it will be useful if you learn it,
do you good, if you have it:
you know, if you’ve a friend, one whom you trust well,
go to see him often;
for brushwood grows, and tall grass,
on the road which no man treads.
Below are additional selected citations in chronological order.
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