There are 3 titles associated with this firm.

Jones, Sir W. The Works of Sir William Jones. In six volumes. London: George, George, and John Robinson, Robert Harding Evans [26 Pall Mall], 1799.
Delille, Jacques. The Gardens, a Poem. Translated from the French of the Abbé de Lille. By Mrs. Montolieu. The second edition. London: James Robson, Edward Kerby, John White [Fleet Street], Robert Harding Evans [26 Pall Mall], 1805.
Taylor, Ann, M., Laetitia Pilkington, Elizabeth S. Rowe, Mary W. Montagu, John Aikin, and Anna L. Barbauld. Essays on Song-Writing: with a collection of such english songs as are most eminent for Poetical Merit. By John Aikin. A new edition, with additions and corrections, and a supplement, by R. H. Evans. London: Robert Harding Evans [26 Pall Mall], 1810.