Given that the words ‘Africa’ or ‘African’ are not present in the name of the Centre, many might be surprised at the quantity and quality of material relating to that continent, held at the Henry Martyn Centre. It is held in a variety of formats including correspondence, photographs, maps and newspapers. In addition to this archival material, the Henry Martyn Library offers a very rich resource which complements the archival holdings. Books, unpublished theses and journals about Africa are all to be found there. I will begin by explaining briefly what the Henry Martyn Centre does, and about how the archive has developed. I will then go on to explain how the very strong African link has been forged and fostered over the years. In the second half of this paper I will consider in what ways these African collections could be described as ‘hidden’, and how we are addressing that. I will be taking a ‘case study’ approach, focussing on a few key examples.