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We know River met Vastra in "A Good Man Goes to War" & it was River who was left to get Vastra & the others back to their own times & places at the end. They seemed to know each other quite well in "The Name of the Doctor", with Vastra aware of River's fate in the Library ("Forest of the Dead") as she communicated with the CAL version of River. Whether this is an indication of further meetings between River and Vastra, we do not as yet know.