"... At fourteen paces from where this wall rises from the lawn stands the ever-plashing fountain. The basin is circular, while around runs a paved path, hemmed in by smoke-blackened laurels and cut off from the public way by iron railings. The water falls with pleasant cadence into a small basin set upon a base of moss-grown rockwork. Looking south one meets a vista of green grass, of never-ceasing London traffic, and one tall distant factory chimney away in the grey haze, while around the fountain are four stunted trees. On the right stretches a strip of garden, in spring green and gay with bulbs which bloom and die unnoticed by the hundreds upon hundreds of London's workers who pass and re-pass daily in their mad, reckless hurry to earn the wherewithal to live. "Halt upon the gravel at that spot on the twenty-third of the month punctually at noon, and she will pass wearing the yellow flower. It is the only trysting-place. She has kept it religiously for one whole year without--alas!--effecting a meeting. Go there--tell her that I still live, shake her hand in greeting and assure her that I will come there as soon as ever I am given strength so to do. "I have been at that spot once only, yet every detail of its appearance is impressed indelibly upon my memory. Alas! that I do not know its name. Search and you will assuredly find it--and you will see her. You will speak, and give her courage." I bit my lip. A sudden thought illuminated my mind. The yellow flower! Was not the mysterious woman whom I was to meet on the night of the fourteenth also to wear a yellow flower--the mimosa! CHAPTER IV. "DEAR OLD DIG." I told Edwards nothing of Sir Digby's curious request, of his strange confidences, or of the mysterious letter to "E. P. K.", which now reposed in a locked drawer in my writing-table. My friend, be he impostor or not, had always treated me strictly honourably and well. Therefore, I did not intend to betray him, although he might be a fugitive hunted by the police. Yet was he a fugitive? Did not his words to me and his marvellous disguise prior to the tragedy imply an intention to disappear? The enigma was indeed beyond solution. At seven o'clock my visitor, finding necessity to revisit Harrington Gardens, I eagerly accompanied him.