D'Arcy Wentworth Thompson

A cache of letters from J. S. Haldane to d'Arcy Wentworth Thompson (he with the beard, caught in the act of botanizing) has just come my way. They add some fine touches, especially for the final section of my Haldane life story. I enjoy this aspect of writing, having the book essentially written yet finding touches and details to inject into different passages and enliven them. I use the same technique in fiction.
D'Arcy Thompson was a wonderful man. His masterwork was 'On Growth and Form' and he has the world record for time spent in a professorial chair. Born round the corner from J. S. Haldane they shared an Edinburgh childhood together, and Haldane's whole subsequent life.