discourse at length

See: outpour
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References in classic literature ?
We wondered much at one another, to see we were all blind of the same eye, but we had no leisure to discourse at length of our common calamities.
When she had made Nicholas thoroughly comfortable with these and other inspiriting remarks, she would discourse at length on the arduous duties she had performed that day; and, sometimes, be moved to tears in wondering how, if anything were to happen to herself, the family would ever get on without her.
Galen in his ancient classic On the Usefulness of the Parts of the Body could discourse at length on the intricate connection of the parts of the hand and their usefulness for gripping, and conclude that such design pointed to a divine Designer.
This centuries-old geezer, a kind of Kurtz for the ages, also speaks English, and extremely well at that, which allows him to discourse at length with the incensed but articulate Alexander.
If you are looking for new words, how about bloviate: "To discourse at length in a pompous or boastful manner"?
These are the hardcore fans of the great British pint, connoisseurs who can discourse at length about fermentation, serving temperatures, cloudiness and head.
Although the physicians in the great amphitheater could discourse at length about the relative merits of multi-antibiotic regimens versus surgery, none suggested asking this young woman what pain she was going through that prompted her use of IV narcotics, again and again bringing her to the brink of death; nor did the thought of enrolling her in a drug abuse program seem to cross their minds.
Pipe in hand, wearing a natty sweater vest, Bill Wilson then proceeded to discourse at length about "structural barriers" and the "shifts in economic life chances" that were altering the system of "racial stratification.
The original theme is frequently obscured for thousands of lines while the characters discourse at length.