Very interesting indeed! It would be interesting to know how they came to know eachother but the names of your gggrandparents are not familiar to me. Isaac Dawe was a shipwright and worked in the shipyard there at Plymouth. If your gggrandfather was in that line of work that would explain their friendship. Elizabeth Stockman Finimore's father William Finimore was a Master Mariner so that might be the source of their aquaintance too. Isaac drowned in Plymouth Bay in Nov. 1864 and the family was living at 23 Wolsdon Street, Plymouth, St. Andrew, Devon, England. If your gggrandparents lived in that area then being neighbors might explain their relationship. Good luck in your search.