Stanford's Ballata and Ballabile, op 160, was written for Harrison and first heard on 3 May 1919 at The Wigmore Hall, using a piano reduction.

[5] The Harrison family became friends with Roger Quilter and his circle (including members of the Frankfurt Group) through the Soldiers' concerts in 1916.

[6] On 11 March 1918 Beatrice performed Dvořák's Cello Concerto in B minor with the Royal Philharmonic Orchestra under Thomas Beecham.

The Violin Concerto, written at Grez-sur-Loing in 1919, had its first performance at Queen's Hall with Albert Sammons (the dedicatee) under Adrian Boult in the same year.

Beatrice and her sister gave the first performance of Delius's Double Concerto (which he had completed in 1915 and dedicated to them[7]) in his presence at a Queen's Hall Symphony Concert in January 1920.

After two months' uninterrupted work in his Hampstead flat, Delius finished the concerto in the spring of 1921, and it was performed by the cellist whom Sir Thomas Beecham called 'this talented lady.'

By 1924, she had toured Europe and America, and in November 1925, she returned to the Royal Philharmonic for an all-Elgar concert, performing the Cello Concerto under Elgar's direction.

She made one of the BBC's earliest live outside broadcasts in May 1924 when she sat and played her cello in the garden of her house Foyle Riding[a] at Oxted, duetting with nightingales.

The first published recordings were put on sale in June 1927 and included the Northern Irish folk song, Londonderry Air (the tune of Danny Boy) coupled with Chant Hindu from the opera Sadko (Rimsky-Korsakov) issued on His Master's Voice B2470, together with a recording of singing nightingales coupled with a soundscape titled 'Dawn in an Old World Garden' issued on His Master's Voice B 2469.

[16] Contemporary accounts, including Harrison's letters, are held at the Museum of Music History, Dorking, and cellist Kate Kennedy says that these disprove that a bird impersonator was used.

[19] On 9 December 1992 at Wigmore Hall the Beatrice Harrison Centenary Concert was given by cellist Julian Lloyd Webber and pianist John Lenehan.