Hello. My name isXXXXX and I am a certified appraiser with 25 years in a museum and in the field much it with high quality fine art.
An appraiser most likely can not attribute this work without a signature but certainly they could assess the drawing or study onsite and give you a sense of the appraisal value.
The watermark by James Whatman tells us that this is a very fine support. Whatman was an early paper mill which does enhance the value as their papers were prized and are today but some of those papers watermarks have been forged so an onsite look is important and this should be discussed with the person that you decide to meet with.
In your region, London is going to be the best place to have this seen. Sothebys is the best for 19th century drawings but Christies is a close second and has many more specialist so they maybe easier to make an appointment and be seen.
A full appraisal could cost a bit as it is an in-depth written document so you may want to talk to them about a visual assessment (and discuss possible sale for your own information) They do require an appointment but will meet with the public to discuss the work. Then you might decide to do a fuller assessment after you talk to them. With a bit of a travel this would be helpful too to know who you are meeting with at a set time.
Here are the departments that you want to contact. I would call rather then email as they are very busy auction houses and an email is easily lost. If you can not reach the specialist in Sothebys British department of drawings, I have added the British painting specialist and a general telephone number that could direct you.
All my best with this nice piece - I think you are in an excellent position being only about 2 hours away from London where the best houses of art are located with excellent British drawing departments! Enjoy the journey, (see below)
PS If you have other items of interest please remember my name. Any post addressed to “Kim D” at the head of the question will be sent to my inbox so I can help my return patrons first!
I would be more than happy to work with you again!
British Watercolours & Drawings 1550-1850
Tel: +44 20 7293 5083
British Pictures 1550-1850
Tel: +44 20 7293 5482
Sothebys General Telephone
34-35 New Bond Street
London W1A 2AA UK
Tel: +44 20 7293 5000
British Drawings and Watercolor after 1600
Tel:+44 (0)20 7389 2709
Tel:+44 (0)207(NNN) NNN-NNNN