This year I'll be taking a series of guided walks in conjunction with Friends of Middleton Park and the Middleton Railway, exploring the remains of early coal mining in Middleton Park, Leeds.
The walks will meet the 1100, 1300 and 1440 steam trains from Moor Road on arrival at Park Halt and we will follow old wagonways through the park to the visitor centre and horse gin replica. We will make a few stops to see the remains of early coal mining including bell pits, pillar and stall workings and horse gin sites. The walk is about 30 minutes on good paths along a steady up hill gradient once used for gravity wagon operation. At the visitor centre visitors can either return straight to the railway, about 10 -15 minutes down hill on a direct path that was once another wagonway, or stop off for tea at the cafe and check out other events in the park returning at their leisure. The last train back from Park Halt is 1615. The walks will be taking place on the following Sundays: 17th April, 29th May, 26th June, 10th July and 21st August.

Apologies for hi jacking the thread.

What has been published about Middleton Colliery? I am particularly interested in Smeaton's pumping engine for the mine.

http://www.fomp.co.uk/html/survey.htm 
The Middleton Railway's history booklet also has a fair bit about the colliery it was built to serve.
I really need to do some research in to the Smeaton engine. I gather there are some nice drawings in Leeds library but I haven't got round to looking for them yet. In the walk I'll just touch on the use of steam engines, concentrating mainly on the earlier pits that used man or horse power, though I'm thinking of doing a longer walk that takes in the remains of the steam powered Wood Pit at some point.
http://www.elhas.org.uk/publications.htm  but it doesn't go in to much detail on his steam engines.

I am currently working on a conference paper on Smeaton's "fire engines".

I've seen Martin's paper.

John Farey in his treatise on the steam engine of 1827 mentions the Middleton engine in passing (p. 242).

https://books.google.co.uk/books?id=k89TAAAAcAAJ&printsec=frontcover&dq=farey+treatise+steam+engine&hl=en&sa=X&ved=0ahUKEwiBj4eYne3LAhXFOBoKHfUOB3sQuwUIHzAA#v=onepage&q=farey%20treatise%20steam%20engine&f=false 

The Royal Society hold ten of Smeaton's drawings of the Middleton engine. I've yet to see these but am planning a London trip later in the year.

That looks like a useful book for this and my interest in local engine making so I've added it to my laptop and my phone for a bit of light bed time reading.
I'll see what I can find on the engines in the local libraries and archives but it might take a while because of the day job.

The 2nd day of this summer's series of mining walks in Middleton Park is on the 29th May. The complete walk from the railway to the park visitor centre actually takes about 45 minutes but if anyone wishes to return on the next train it is possible to see examples of bell pits, pillar and stall working and earthworks from the wagonways and still be back for the next train. For those with plenty of time we'll continue along the wagonway and see more old pits including evidence of a horse gin and the replica of one at the park visitor centre. It is then 15 minutes down another wagonway to get back to the railway.