Caveat-I am not up to date on the latest merionesque thread on NGLA so this may all be moot. However I was operating under the assumption that Devereux Emmett surveyed holes in the British Isles for CBM prior to the opening of NGLA. However I was able to procure his first passport application from the Smithtown, NY library.
In that application he states that he had not resided outside the US except for "British Isles 1913 for four months"
and this would seem to be after CBM developed NGLA
any thoughts?