Thank you for submitting your item for appraisal. This appears to be a pair of british watercolours of the late 19th century, depicting seascapes with various sailing vessels. According to the information you provided both water colours are signed Robert J. Dunn. Unfortunately the artist is not listed, the artist did not exhibit nor were is paintings sold at auction. Learining to draw was part of the educations in the 19th century in Great Britain. It is very likely that the artist was just an amateur artist. The estimate is based on similar water colours by lesser known artist offered or sold at auction. There is no measurement for the sentimental value you might attach to the item.