The fifteenth volume of The Correspondence of John Tyndall contains 466 letters covering the period from November 1875 to December 1877. Tyndall was by now an established man of science with a far-reaching reputation. The most significant work he undertook in this period involved his experiments on spontaneous generation and his consulting for Trinity House on lighthouse illuminations and sound-signaling. Alongside these projects, he married Louisa Hamilton in a small ceremony in London on February 29, 1876. This event offers a brief respite from the intense scientific and technical communications that dominate his life in the mid-1870s, and subsequent letters reveal his newfound domestic happiness.