[BroJoeK]

Strong: "The Quartette in F, Beethoven’s Opus 19, was not intelligible to me, but admirable in the better informed judgment of others..."

Those words "not intelligible" I'd apply to something from, say, John Cage, never to Beethoven.
And, I can't find a quartet for Beethoven's Opus 19, leading me to wonder if Strong doesn't mean some other Opus 19 quartet?
But if he is referring to the following Opus 19 concerto, I think it's delightful and you can judge for yourselves:

Bethoven's Opus 19, Piano concerto

Here is another quartet in F, Opus 19, but not by Beethoven.
Also delightful.

[Homer_J_Simpson]

When I was prepping this entry for posting if figured I would link youtube versions of the pieces so we could compare our opinions to those of George Strong. But I ran into the same difficulty identifying them with all the ones he mentioned. Maybe the numbering system changed over the years.

[Tax-chick]

I think it’s very nice, but I don’t know if it’s “intelligible.” I haven’t done the course on understanding the details of classical music. I just listen to stuff.