People
And so I set these things down before the onset of the first of a thousand small physical degradations as, in a still-distant suburb, Death strides whistling towards me.
— Barry Humphries

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker wants to record these things before physical decline begins, while imagining Death approaching from a distant suburb. The whistling stride gives mortality an oddly casual presence. That ordinary, almost neighbourly image brings dark humour to the prospect of ageing and death.
Context reviewed