At a thanksgiving service for a victory at the Battle of Oudenarde, Anne did not wear the jewels that Sarah had selected for her. At the door of St Paul's Cathedral, they had an argument that culminated in Sarah offending the Queen by telling her to be quiet. Anne was dismayed. When Sarah forwarded an unrelated letter from her husband to Anne, with a covering note continuing the argument, Anne wrote back pointedly, "After the commands you gave me on the thanksgiving day of not answering you, I should not have troubled you with these lines, but to return the Duke of Marlborough's letter safe into your hands, and for the same reason do not say anything to that, nor to yours which enclosed it."