nothing according to the article actually indicates that this was done by tess. it does mention the fact that she left but not something she had actually worked on.
*style.com
NEW YORK, February 5, 2008 – Ghost Army, the title of TSE's Fall collection, refers to the unusual top-secret military unit founded during World War II. Counting the likes of Bill Blass and Ellsworth Kelly among their ranks, these troops used artistry, props (inflatable tanks, for example), and sound effects to distract the Germans' attention from the movements of the combat battalions.
Ironically, there was more than one ghost in the room, as Tess Giberson, who designed the clothes, left the company shortly before fashion week. The collection was shown in presentation format, and there were no signs but that it had been well thought out and created with care. Fur was introduced for the first time in the form of alpaca, and was used on its own or with knitwear. An abstract camouflage print was the most obvious nod to the theme. The military-style toppers relate not only to the current season, but are also in keeping with what Giberson developed over her time at TSE.
– Laird Borrelli-Persson
*style.com