She was heartily encored for her first song, and responded with a sympathetic rendering of Bonnie Wee Thing; whilst Stay at Home was sweetly interpreted.

"[27] Her outfit was also described in a section called "Some of the Dresses [by Helen]" as "old gold satin, veiled black-striped gauze, the rounded yoke of the high bodice being defined by graduated ruches of black chiffon.

[30] On 1 January 1903, Soga was the contralto soloist in the Coatbridge Choral Union "Grand New Year's Mid-Day Concert" performance of Handel's Messiah,[31] but on that occasion she was described as "weak at the outset but she improved wonderfully as time went on ... her best effort was the passage 'He was despised'.

[38][39] Soga advertised in The Scotsman for singing pupils, teaching weekly in a piano specialist salesroom,[40] near a girls' school in Stafford Street, Edinburgh.

Soga used her singing talents and connections in organising entertainments or raising money as part of the leadership in Glasgow of the women's suffrage campaign between 1908 and 1917.

In 1915, in association with the noted elocutionist Marjorie Gullan, she arranged a dramatical and musical recital as part of a Grand Bazaar raising funds for the families of soldiers and sailors.

The Bazaar, which took place in the Byzantine Galleries in the Royal Polytechnic in Glasgow's Argyle Street, was opened by noted suffrage campaigner, Lady Frances Balfour[41] In 1924, Soga joined An Commun Gaidhealach but it is not known if she performed at any of the National Mòds.

[42] The Woodside Choir, with Soga as conductor, achieved Second Place in the "Female Voice Choirs" section of the Edinburgh Music Fesrival held in the Usher Hall in May 1928, as was reported in the Edinburgh Evening News[43] In 1908, Soga was one of the "prime movers", according to suffrage campaign leader Teresa Billington-Greig, in creating a large new Women's Freedom League branch in the prosperous West End of Glasgow (Hillhead).

Semple were appointed joint branch secretary in February 1908 and hosted an "At Home" event in the same halls in April, with Margaret Irwin (trade unionist) as keynote speaker.

[53] A group of leading suffragettes were pictured in Glasgow at a Bazaar on 7 May 1910, including Soga and Florence Haig (back row) and Miss Fraser Smith, Mrs. Saunders, Mrs. McDonald, Frances McPhun, Flora Drummond, Emmeline Pankhurst, Georgina Brackenbury, Annie S. Swan, Annie Walker, Miss S. Nairn, Mrs Lawton Although involved in the Women's Social and Political Union she did not take part in violent protests.

[59] Soga died in the Old People's Cottages in Rottenrow in the early hours of 23 February 1954,[4] aged 83, and her funeral was at the Western Necropolis Crematorium, Glasgow.

[3] In 2024, the first known image of Soga was found in Scots Pictorial, and published on Wikimedia Commons, and she is to date, the only known Scottish woman of colour campaigning for the vote during the suffragette era.