I've still not come up with anything about "T.CHAPMAN" & "SONS" that I mentioned earlier.
However on the Hearnshaw name, I stared to look last night, but it was getting late; Like Michael, I'd also spotted a few tools via Google image search.
It's often worth having a look at the various on-line stuff in the Ken Hawley collection; he was a tool dealer and collector of repute in Sheffield before his retirement.
http://www.hawleytoolcollection.com/index.php?sheffield-tool=the-collection
Part of the collection is Name on a Knife Blade
https://www.hawleysheffieldknives.com/index.php?val=h&kel=1490
where it's interesting to look at both Hearnshaw and Rogers Brothers (Note there are several different entries for various Rogers).
https://www.hawleysheffieldknives.com/n-fulldetails.php?val=r&kel=1064
See also a fairly eclectic site on Billhooks https://www.billhooks.co.uk
I only mention this, as somewhere on their site, and I know not where, there is a direct download link to a pdf of Sheffield edge tool manufacturers
For the nervous amongst you this is a direct link, and doesn't open in a web page.
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiD7cyygavwAhXnQEEAHRKcAEUQFjAEegQIBhAD&url=https%3A%2F%2Fwww.billhooks.co.uk%2Fapp%2Fdownload%2F5783009499%2FSheffield%2BEdge%2BTool%2Bmakers.pdf&usg=AOvVaw33OJ3xqOJRFoz0bXRVKJG4
From that document P16;
Hearnshaw, George (Edge Tool Manufacturer). Residing at 45 Nottingham Street, in 1871. Recorded in: Whites Shefffield & District Directory – 1871.
Hearnshaw Bros. (Manuftrs. Of light & heavy edge tools, etc.). Residing at 50-52 Sorby Street, Sheffield in 1905. Recorded in: Whites Directory of Sheffield & Rotherham.
I've never been able to find an on-line copy of Whites, though there were other subsequent directories as well, some of which are listed here, but again without on-line access.
http://www.sheffieldindexers.com/DirectoriesIndex.html
Here we have another plane with the Three men In a Boat logo, rather than the more familiar John Bull one, which they seem to have acquired in 1889
https://www.worthpoint.com/worthopedia/beech-steel-badger-plane-samuel-162019485
Note that the court case was against different Hearnshaw Brothers, Frank and William, as mentioned in the earlier Rogers Brothers reference.
Lots more to be found I'm sure;
Bill
Edited By peak4 on 02/05/2021 14:07:59