Shortly after the exhibition, she returned to Russia. However, in February 1918, in the wake of the Bolshevik coup d'état, the majority of the British staff at the Anglo-Russian Hospital in Petrograd returned to the UK, leaving a Russian Red Cross commission with supplies for a further six months. Lady Muriel remained in Ukraine, but she, along with three of her nursing sisters and a doctor, a number of British civilians, and the British diplomat John Picton Bagge, had to be evacuated from Russia very soon afterwards, travelling back to the UK via Moscow, Vladivostok, Tokyo (17 April), Toronto (7 May), and the United States. In the party with her was Dr. Thomas Marsdon, a pseudonym for Dr. Thomas Masaryk, who escaped incognito from Eastern Europe, and who subsequently was invited by President Wilson for talks on the future of Czechoslovakia. An account of what she had seen and experienced in the weeks following the revolution was published in the "New York Times". She finally arrived in London on 9 July, and was received by the King and Queen a week later. She took the opportunity to call British attention to the desperate appeals for aid and assistance being made in the US by Lt.-Col. Maria Bochkareva, foundress of the Russian Women's Battalion of Death.