The literary and pedagogic style of books popularizing marine natural history for the British public shifted during the nineteenth century. Previously, natural history books had been written largely by men, with notable exceptions like Isabella Gifford, Mary Gatty and Mary Roberts. Gentlemen naturalists tended to be clerics or medics; educated men conventionally viewing their interest as revelatory of the Divine in nature. Typically, women were less well educated than men but some from clerical backgrounds, having better access to learning, became significant popularizers of natural history. Gosse's works promoting aquaria and “rock-pooling” (typically among the middle classes), helped to develop a ready market for the plethora of popular seashore books appearing in the 1850s; with coastal access being facilitated by expansion of the railways. Controversies concerning evolution rarely penetrated works aimed at a popular readership. However, the style adopted by marine natural history writers had changed noticeably by the end of the nineteenth century. The earlier conversational dialogue or narrative forms gave way to a more terse scientific style, omitting references to the Divine. Evolutionary ideas were affecting populist texts on littoral natural history, even if only covertly.