Her obituary appeared on p. 6 of The China Mail, 1936-09-16:
OBITUARY
Mrs. W. Darby Passes Away
SALVATION ARMY WORKER
The death occurred at the Matilda Hospital yesterday, of Mrs. (Brigadier) Darby, wife of Brigadier William Darby, General Secretary of the Salvation Army in South China.
The deceased lady, who was 51 years of age, arrived in Hong Kong with her husband in June, from Shanghai, where they had spent six years, prior to which they were in other North China centres for ten years. Mrs. Darby was a native of Birmingham, England.
The Late Mrs. Darby was taken ill a fortnight ago whilst on holiday at Cheung Chau island, and her condition became gradually worse, necessitating her admission to hospital last Thursday. Besides her husband, she leaves three children, one of whom is in Shanghai and the other two in Hong Kong. [...]
She is buried in the Hong Kong Cemetery:
Sacred / to the memory / of / Miriam / beloved wife and comrade of / Brigadier William Darby / The Salvation Army / promoted to glory September 15th 1936 / aged 51 years / She gave herself , on earth her works remain / in Heaven with Christ her Lord / in sublimest fellowship / she ever lives to reign / Brown Jones & Co. # 9614