Ghostly skirt sighting in the Keep

I was talking to one of the room stewards this week when I was at the castle for the volunteers Christmas dinner. I had not see her for a while and had heard that she had experienced something strange in the Keep a few weeks ago. Several people had mentioned it to me, so I was very pleased to see her and hear her story. I always try to speak directly to people who have had a ghostly encounter so that I get the story in their own words.

She told me that she had been standing in the corridor near the Nursery Bedroom which used to be Alice Douglas Pennant's room. She was on duty as a room steward that day. She had her back to the King's Bedroom and was looking through the door of the Slate Bedroom, so that she could see if any visitors came into any of the rooms in that area. She suddenly saw someone walking up the corridor towards her wearing a long cream coloured skirt with ridges on it.  She noticed that it was an Edwardian style skirt. As the lady went past her the skirt swished as she walked. The room steward looked up to speak to her and realised that there was nobody there. She looked in all the bedrooms in the Keep but there was no other person around. She was adamant that she had seen the long skirt and was aware of the lady walking towards her. She seemed completely real to her. She said that the experience was not frightening at all, but was so vivid that it stayed with her for about three weeks afterwards.

Alice Douglas Pennant (1862-1939)

I wonder if this could have been the Honourable Lady Alice Douglas Pennant whose bedroom was in the Nursery Room next door and who has been sensed and seen in the room many times by different people over the years?