Reading this Hammond Innes novel immediately after Golden Soak reveals that by the latter part of his career Innes had hit on a formula. Take a middle aged Englishman with no ties, produce an attractive younger woman in need of some help, set up an issue of survival in an exotic location and weave a story. Here we move from Western Australia to Bougainville although Australia and large copper mines are still right in there. Add a family feud and some mystery to solve and you have it done. As a philatelist I was interested in how the Solomon's Seal stamps were used as an item of mystery and intrigue. I wonder though if Solomon's Seal's story of a family shipping company will echo elements of The Strode Venturer and The Wreck of the Mary Deare,.