Dannie Abse refers to the problem of pinning down either his youthful memory of Cardiff or his new adult experience. How does he express the problem of pinning down his past and present experiences in the middle three stanzas?

Unfocused voices in the wind, associations, clues,
odds and ends, fringes caught
, as when, after the doctor quit,
a door opened and I glimpsed the white, enormous face
of my grandfather, suddenly aghast with certain news.

Unable to define anything I can hardly speak,
and still I love the place for what I wanted it to be
as much as for what it unashamedly is
now for me, a city of strangers, alien and bleak.

Unable to communicate I’m easily betrayed,
uneasily diverted by mere sense reflections
like those anchored waterscapes that wander, alter, in the Taff,
hour by hour, as light slants down a different shade
.

Do we or the young Dannie Abse know what the grandfather’s news was?
How far is Dannie Abse being ironic when he says he ‘can hardly speak’ and is ‘Unable to communicate’ about the experience?
How does the simile about the reflections in the River Taff give an insight into his thoughts and feelings?