Sorry, I missed that part. IDK what that signifies in this case. Probably that there was appreciable fog on the grains to start with. These early emulsions were difficult to control and at that time, some were developed in developers containing ammonia.
Modern B&W film emulsions are gray or blue gray due to being panchromatically dyed, containing acutance dyes, and due to the AH dye undercoat. At that time, the emulsion would not have been panchromatic and would have been yellow or light orange if correctly prepared and fog and silver free.
I just remembered that there was a procedure whereby they looked for the formation of a series of different colors in samples of the diluted emulsion examined under transmitted light. This color gave them some sort of measure of the grain size and degree of ripening due to internal reflection changing as grain size changed. Different colors meant different grain sizes, but the actual bulk color of the emulsion was still yellow orange. This procedure was rather wide spread in the very early days of photography.