I think that I've cracked it!
On the site that Jack mentions, the important part of the page is the "SCOTTISH LINE INFANTRY 1914" panel, showing all the regimental badges as at 1914
At the very bottom the badge is that of The Seaforth Highlanders (72nd and 78th of Foot).
To the left is the badge of The Gordon Highlanders (75th and 92nd).
Note that they both use the caberfeidh as the centrepiece, but the Gordon's badge has garlands (probably not the correct heraldic term !) on either side.
Looking as closely as is possible at Linda's photo and Jack's emailed photo I'd come to the conclusion that both of them are probably Seaforth Highlanders.
That probability becomes a certainty when you look very closely at the bottom of the sporran badges. It's very hard to see the detail on the site Jack mentioned, but I've got other printouts of the regimental badges.
The strip that shows the motto, at the bottom of the sporran badge, is a downward curve, - think "frown", - for The Gordons - the motto is "Bydand" (Watchful).
The Seaforth motto strip, onthe other hand, is an upward curve, - think "smile", - the motto is "Cuidich'n Righ" (Help the King).
QED
Looking at all the Scottish regimental badges I can only see one other pairing that could be as difficult to distinguish, - The Black Watch and the HLI, except that, pipers apart, the HLI wore trews from 1881 to 1947
David
PS Just in case anyone is wondering, these two regiments were created in 1881 by the amalgamation of 2 predecessor regiments.
In the case of The Seaforths, the predecessor regiments were the 72nd of Foot The Duke of Albany's Own Highlanders, and the 78th of Foot The Highland Ross-shire Buffs.
The Gordons were created from the 75th of foot The Stirlingshire Regiment and the 92nd of Foot The Gordon Highlanders.
All the photos involved here are thought to be well after 1881. In fact "Linda's" badge was only adopted by the regiment in 1901.
dww
