None of the first-class maids were lost. I'm afraid the list in ANTR was a rough copy of the Senate Investigation roster which incorrectly listed several of the maids as having perished. All of them turned up alive -- most of the valets, however, were not as fortunate.
I recently saw a PBS show on Titanic interviewing Mrs. Wallis's granddaughter who told us that Mrs. Wallis was "invited" into a lifeboat but turned and ran to her cabin stating that she needed to get her "papers", presumably personal business. Who knows? Dennis
I don't have much faith in newspaper accounts without credited sources, but having said that I don't feel this one conflicts with the PBS version. If Mrs Wallis preferred the 'safety' of the unsinkable Titanic to the descent into darkness in a lifeboat she was certainly not alone in her choice, at least in the early stages. But while the passengers could make up their own minds, Wallis was a crewmember under orders so if she had intended to head for her cabin and stay there she might still have felt a need to give the impression she intended to return. Once away from the officers on the boatdeck, she is more likely to have given a straight answer to any fellow steward who tried to persuade her to go back. Pure speculation, of course!
Specifically, that site claims: "There were black maids, who had to go down with the ship because of their skin even though all women were supposed to get on the little boats".
Untrue on several counts. Second Officer Lightoller turned several stewardesses (all white) away from the boats because they were crew members. Whatever their colour might have been, there were no maids among the victims. The suggestion that colour was a consideration in the loading of the boats does no justice to the crewmen involved, who made so such distinction. Among the 3rd Class passengers the dark-skinned Syrians, for instance, achieved a much higher rate of survival than did the white Anglo-Saxon British.