[3] He worked on numerous decorative projects in the 1850s, starting with the hall ceiling at Merton College, Oxford, where he was a Fellow from 1842; his conversion entailed his giving up that fellowship.
[8] Later he worked for the South Kensington Museum, where he was appointed assistant keeper in 1863, and was made editor to its science and art department, producing catalogues.
This was a multi-volume project, beginning publication in 1870, its aim being to furnish a complete bibliographical record of art books in libraries of the West.
[9][10] He resigned his position at the South Kensington Museum to become private secretary to George Robinson, 1st Marquess of Ripon, whom he then accompanied on a visit to India.
[11] There is a memorial stained glass window in the north aisle of St Mary of the Angels, Bayswater by James Powell & Sons based on a sketch of Pollen's for the Chapel of Studley Royal.