my same answer,
again and again.
the gossamer threads of his memory
Mnemosyne can weave them.
I’m aware this should probably be Atropos and Clotho, but Mnemosyne seemed more appropriate.
He was diagnosed with Alzheimer. Observing him over time this seemed a fair description of the progress of his illness as regards his short-term memory. It doesn’t reflect the initial strength of his long-term memory though.