sentences:  It included articles and book reviews about all aspects of the Colonial Empire and the related experiences of colonial officers and their families.OSPA's closure was marked by a farewell event held in London on 8 June 2017.The guest of honour was the Prince of Wales, who gave a speech expressing the thanks of the Queen and of himself for "the extraordinarily valuable contribution, let alone the personal sacrifices, made by members of the Overseas Civil Service (and its previous manifestations) during the nineteenth and twentieth centuries".