[5] As special artist and correspondent to The Sphere, he was assigned to the Duke and Duchess of Cornwall and York's 1901 tour of New Zealand.

He drew a weekly cartoon for Votes for Women from 1909, and was also regularly published in The Illustrated London News, Boy's Own Paper and Punch.

[6] Pearse produced various artworks, cartoons and propaganda related to British efforts in World War I.

From 11 September 1918 to March 1919, he held an honorary captain's commission in the New Zealand Rifle Brigade, NZEF, as official artist, painting the battle scenes in which the 1st NZRB figured.

He was a wood engraver, book illustrator and art critic, including for the Manchester Guardian, and for eight years had been a member of Joseph Barnby's Royal Choral Society.