Hi Fiona
I had a quick look in at the Dumfries Library today and found the following grave stone inscription in Penpont. It as the name Helbert and Brown so looks like your ancestors.
In memory of Jean Helbert spouse to John Hyslop, who died at Newhouse 7 Sep. 1828 aged 50 years.
And of Mary Brownrig, second wife of John Hyslop, who died 12 May 1838 aged 47 years, the above John Hyslop died at Holmbank, 28 Nov. 1858 aged 67 years, Isabella Hyslop daughter of the above died at Penpont, 4 Jan. 1873 aged 59 years, John Hyslop son of Adam Hyslop, who died at Honeyhole, 18 May 1869 aged 16 years, the above Adam Hyslop died at Honeyhole, 16 Nov. 1885 aged 66 years. Janet Brown wife of the above Adam Hyslop died 28 Dec. 1901 aged 83 years, also Janet Farrow, granddaughter of the above Adam Hyslop who died at Honeyhole, 5 Feb 1931 aged 59 years, Isabella Hyslop died at Honeyhole, 30 Dec. 1935 aged 88 years, daughter of the above Adam Hyslop, also James Hyslop died 19 Dec 1943 aged 95 years.
There is also a photograph of Richard and Thomas in the local paper of May 1917.
If you have not already got these could you give me your email on a PM. The micro fiche is not so good so I will take a digital.
There are quite a few entries in the newspapers for Hyslop. If there was anything in particular or address that you could give me to help indicate which might be your ancestors I will extract entries for you.
It is okay if you don't want to give me your email I will send them through the site.
Betty