He said that the previous night Gertrude had been much disturbed, and had talked a great deal in her sleep, and that on awaking she had told him her dream in these words: 'I thought that I was standing at the door with you, when the holy nun came out of the door of the next house, and I told you to look at her.

She stopped in front of us, and said to me: "Ah, Gertrude, you look very ill; I will send you some rye-flour and eggs, which will relieve your chest." Then I awoke.' Such was the simple tale of the poor man; he and his wife both eagerly expressed their gratitude, and the bearer of Anne Catherine's alms left the house much overcome.

He did not tell her anything of this when he saw her, but a few days after, she sent him again to the same place with a similar present, and he then asked her how it was she knew that poor woman?
'You know,' she replied, 'that I pray every evening for all those who suffer; I should like to go and relieve them, and I generally dream that I am going from one abode of suffering to another, and that I assist them to the best of my power.

In this way I went in my dream to that poor woman's house; she was standing at the door with her husband, and I said to her: "Ah, Gertrude, you look very ill; I will send you some rye-flour and eggs, which will relieve your chest." And this I did through you, the next morning.' Both persons had remained in their beds, and dreamed the same thing, and the dream came true.

St.Augustine, in his City of God, book 18, c.