 Gillham joined a McCoy Society trip to Chinaman Island on 10 May 1958, in the North-West corner of Western Port, where she created lists of the Island's grazed and ungrazed plants.Later that month Gillham also holidayed at Albury, moving to Sydney, Kempsey and then to Brisbane.She then also paid visits to Lone Pine Koala Sanctuary, Lota, Moreton Bay Islands and Enoggera Reservoir.