H. Hadfield Cubley painting

Found this awesome painting (watercolor) in my mother-in-law's attic when were cleaning it out after she passed away. the painting is signed. i sent a snapshot of the picture and the signature to the museum in England and they said from what they could see it is a Cubley. of course they recommended that I take it to an art appraiser for authentication. I have no idea how this painting could have ended up in Warrenton, NC other than there were 3 fairly well to do spinster sisters who lived next door to them, The Dameron sisters, who traveled the world extensively as missionaries in the early 1930's and 40's. they would always bring my mother-in-law something back from their trips. she has many items from Japan and China and a few from England.