Referring back to my initial post on this thread I have now found hundred(s) of newspaper articles relating to new organs built by the Halmshaw family in the British Newspaper Archives. I am still in the process of downloading all the relevant pages and then transcribing the information so this will take some time. Surprisingly, Joseph Halmshaw was building organs himself from as early as 1842 when one was erected in Flockton, Yorkshire, while he was living in Dewsbury. He built several more over the following years while living in Dewsbury until by early 1849 he moved to Birmingham, at 367 Coventry Road, Bordesley where he continued producing them until perhaps 1854 when the company was first registered at Camp-hill. Clearly, some of the reports are duplicated by different newspapers. While some reports contain very little information, simply saying a new organ was opened, or erected, others are very detailed, mentioning types of stops and keyboards, pedals and pipes with sizes, who the organist was and how much they cost.
I have added a copy of my working file which is still very much a work in progress and only covers the first two decades but does give an idea of what is out there. I don't know how many newspapers are still to be digitised but it is likely to take several more years, just as it is likely to take me a long time to complete my transcriptions.
Halmshaw Organ Newspaper clips.docx