Incident in St. Christopher's Place

Dear, I haven’t been in touch
For a long time.
Sorry.
The last time I saw you
Was in St. Christopher’s Place.
It was a lovely evening...
When I knocked that chair over.
I am sorry.
Since then,
I’ve had not a few accidents
Of that kind.
                                                             
Just three days ago,
I slipped out in a garden
At a friend’s house...
And keeled over, not once,
Not twice, but three times,
Like a log...clonking my nut
So violently that people heard me
In the sitting room.
What’s more,
I can’t remember a single sentence
Spoken all evening. The problem is…