I don't like sepia toned darkroom prints. However the historical importance of sepia toning was to increase the longevity of images as much as to ‘improve’ the appearance. I found a textbook illustration which seemed reasonably pleasant and tried to match the tones and colours. My settings for Hue/Saturation/Lightness were: Colourise-->Hue 30 degrees, Saturation 40%, Lightness 5%. I don't know whether the colour wheel index convention used for Hue is the same in Adobe software. The result looks authentic early 20thC but I don't much like it.