[1] Manning was a founder member of the London Froebel Society in 1874 with her cousin Caroline Bishop.

Bishop was advising the London School Board on the use of Kindergarten methods and Manning presented a paper on the same subject to the Social Science Association.

Manning created a book of guidance called Handbook of information relating to university and professional studies etc.

[3] This letter was championed by Mary Hobhouse and Manning contributed funds, as did Florence Nightingale, Sir William Wedderburn and others.

[3] In July 1904, Manning was awarded the Kaisar-i-Hind Medal, first class, by the King for services to the British Raj.

[1][2] Manning left bequests to the NIA, The Froebel Society, the Royal Free Hospital and Charles Voysey's unorthodox church in Piccadilly.