The history of Ed Ricketts and Jack Calvin was presented by Sitkans  John Straley and Mary Purvis at the Alaska Historical Society annual Conference in Sitka last week. Mary Purvis, grand daughter of  Sasha and Jack Calvin told the story and showed old photographs of the canoe trip her grandparents made in 1929 from Tacoma to Sitka as part of their honeymoon. The trip was later chronicled by the National Geographic. John Straley also presented at the conference about the research done as part of the Between Pacific Tides: Revisiting Ricketts Calvin and Ahlgren intertidal project conducted by the Sitka Sound Science Center and funded by the North Pacific Research Board.  The presentations were well attended and there was a lot of interest about the historical context of Ricketts and Calvin’s seminal textbook Between Pacific Tides which presented the idea of ecological holism and is often thought to be the beginnings of modern marine ecology.