Coffee with X and Friend and the final (?) instalment of the story. Friend indeed arrived yesterday, accompanied by two suitcases and prepared for the week's visit X had suggested. Meanwhile X had remembered the lunch appointment but had had no idea she'd issued any invitation at all. Some laughter. Seems all right now but has agreed to see doctor.
In the evening begin research. Soon learn to avoid using terms like memory blackout, thus avoiding stern suggestions re drinking less. But amnesia does it. Descriptions of temporary global amnesia just about spot on, and much less horrific than other possibilities. Apparently variously triggered, less than 24 hours, and not usually repeated. Narrative accounts match amazingly closely. So, fingers crossed.