— LONDONSir — Your front-page report on the Group of Seven Arctic declaration was admirably comprehensive, but understated, in my view, the role played by the smaller Nordic states in shaping the final language. I served on a working group at the Stockholm International Peace Research Institute during the previous round of polar negotiations, and the lesson of those years was clear: the so-called "smaller" voices in the room have outsized influence in this domain. Your readers might have benefited from a paragraph or two acknowledging that fact. — Bjorn Hagen, Stockholm

Sir — Icebreakers are useful instruments. They are not, in themselves, a strategy. The notion that allied policy can be measured in hull numbers misreads the nature of the contest in the High North, which is at least as much about regulation, science and indigenous consent as it is about ice-class displacement. Your editorialists would do well to keep this in mind. — Captain (Ret'd) D. M. Frasier, Halifax

Sir — A small correction. Your map of the Northern Sea Route inadvertently transposed the Laptev and East Siberian Seas. As a former Arctic mariner, I confess this is the sort of error that, in my generation, would have produced a memo from the captain. In yours, presumably, an erratum will suffice. — J. Henning, Tromso

(The Editor regrets the error and notes that the online version of the map has been corrected.)