The Abrahamson prospect is near the junction of North (Ferguson) Creek and South Lardeau Creek, near the community of Ferguson. The Abrahamson Group originally included the North Star, Crystal and Queen of the Hills tenures. The tenures were worked in the early 1890s; however, their precise location is uncertain.
The Jumbo prospect is at 1350 metres elevation on Six-Mile Creek, a tributary of Lardeau Creek, east of Ferguson. It is on the Jumbo (L.7052) claim, which was originally part of the "Union Jack Group" of seven claims, which included the Union Jack (L.7049) and, most likely, the Florence (L.7051) claim. The latter is described separately. 
By 1899, a crosscut had been driven for 23 metres to intersect a 1.8 metres wide quartz vein at a depth of 21 metres below surface. The tunnel was then continued as a drift. The following year, a new crosscut was stared, either at lower elevation or on the nearby Union Jack tenure. It is not clear from the description. By 1903, this adit had been driven for 31 metres and had cut the vein at a depth of 76 metres. The Union Jack claim or group was reportedly owned by J.C. Kirkpatrick et al. in 1904. There is no mention of old workings in reports written on the Jumbo in the the 1980s and 1990s. 
In the early 1980s, Westmin Resources Limited conducted stream and soil geochemical surveys to the north and west of Lardeau Creek and identified several geochemical anomalies on the lower slopes of Nettie L. Mountain. In 1986, Camfrey Resources Limited followed up some of these anomalies and located the "Jumbo" zone on the Jumbo claim, west of Six-Mile Creek. The following year, it trenched the anomaly. At the same time Nortran Resources Limited and Mulitplex Resources Limited, who also had interests in the area, flew an airborne geophysical survey in the area, including the nearby True Fissure [082KNW030] and Nettie L. [082KNW100] deposits, and located a cluster of encouraging electromagnetic responses west of Finkle Creek. In 1993, Contiki Resources Limited acquired the Jumbo showing and also took out an option to acquire 80 percent of Nortran's interest in the area. In 1994, the company conducted more grid work in the Jumbo area. In 1997, Vision Incorporated resampled the area using a soil auger.
The Jumbo prospect is underlain by isoclinally folded and variably schistose siliceous argillite of the Triune Formation, quartzite of the Ajax Formation and siliceous argillite of the overlying Sharon Creek Formation. The rocks strike to the northwest and dip moderately to steeply to the southwest. 
Exploration in the late 1890s located a quartz vein on the Jumbo Claim that was 1.8 metres wide and included a small vein of galena that was of particular interest to the owners. The vein also included pyrite "carrying small gold values" and considerable galena sprinkled throughout. The second adit, excavated at the turn of the century, exposed a similar quartz vein. It was 2.4 metres wide and contained "concentrating ore" that assayed 1028 grams per tonne silver and "$10/ton" gold. 
The geochemical surveys conducted in the early to mid 1980s produced an irregularly-shaped silver-in-soil anomaly that covered the axis of a complicated fold structure. Its location with respect to the Jumbo vein is unknown. Later work suggested that there were two parts to the geochemical anomaly; however, neither source has been identified.

Jumbo (Union Jack) Target Highlights