Hello Gaye,
I apologise for taking so long to reply. I have checked through the information that I have for the Forbes family line, and cannot find any link to a marriage to a Ross. So saying, we have two links with the name Forbes. One from Logierait (Alexander) who married a Reid some time in the early 1800's and had 6 known children between 1814 and 1829. Then there was an Elizabeth Forbes (a relative of Alexander?), who married into the Cunnison family back in c1780's, with a descendant of theirs marrying another Forbes in 1864.
Apart from some dates/places of birth, we know nothing about the majority of these lines...apart from the one that links to us eventually. So although I have no knowledge of a Ross marriage, that is not to say there wasn't one from 'our lot'.
As for the Buxted area connections. As far as we know, that area comes into play from about 1720 (ish) when we have a family named Mew noted as living there from the early 1700's until around the early to mid 1800's when they started to scatter across the Sussex area. We have a fair few of the names that inter-married with this line, so if you want to pass on any that you know of (and any dates), I will have a look to see if there is any connection there for you.
Hope I have been helpful, and thank-you for contacting me.
Best wishes, Shalena