Mobb Mentality Multi-Cache
Ngaambul: Unfortunately there was no response (or regular update) from the owner within the time requested and as per the original note this cache has been archived. If you wish to replace it please submit a new cache via this link.
Ngaambul - Matt
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Difficulty:
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Terrain:
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Size: 
(regular)
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A short multi that takes you through some of the remaining high blue gum forest in the area, as well as along Terrys Creek walk. A bit of maths is involved but it's addition plus a couple of square roots to make things interesting. No calculator is required.
Total walking distance is around 2km, all of which is pathway or mown grass.
Mobbs Lane is named after William Mobbs (1763-1839); the first member of the Mobbs family to arrive in New South Wales.
He came as a convict on the Barwell in 1798. After his emancipation four years later, William Mobbs took up farming in the district and acquired 12ha of land on the western side of Marsden Rd overlooking the Dundas Valley.
That land sloped down to the Ponds Creek, so he had a constant water supply. After strenuous effort to clear the woodland, he established an orchard that he called the Orange Grove.
His endeavours prospered and he acquired more land such that by 1828, William Mobbs had more than 290ha along the ridgeline of what is now Pennant Hills Rd. His land stretched from Carlingford (originally known as Mobbs Hill) almost to North Rocks Rd. He grew grain and several varieties of fruit but was renowned for his oranges.
In July 1833, William Mobbs was granted land in the area of Mobbs Lane. This land was inherited by his son William, who built a house on the corner of Mobbs Lane and Marsden Road. That house still stands and is heritage-listed.
Mobbs Lane was home to ATN / Channel 7 from its inception in 1956. Sporadic construction was carried out in the following years, so that by 1961 the station had all essential services and amenities onsite. By the early 1970s the station had undergone another stage of expansion, with a six studio facility and conversion of equipment to PAL colour in 1975.
In 2004 the corporate offices and sales departments were relocated to Pirrama Road, Pyrmont, while the news departments were rehoused in Martin Place. In June 2006 the Seven network announced the closure of the Epping studio site following relocation of facilities to the Australian Technology Park at Redfern.
Starting point (S33 47.022 E151 04.016) is the carpark and location of the first clue.
A = the estimated time noted on the sign, in minutes, to complete the Mobbs Lane walk
B = the square root of A
At waypoint WY2 (S33 46.994 E151 03.892):
CC = the house number (the last house), 2 digits.
D = the square root of CC
At waypoint WY3 (S33 47.132 E151 04.020):
E = the last digit of the year in which 125 volunteers planted 4500 trees in the park
FF = CC + B
Cache is located at:
South 33 47.CCE
East 151 04.FFD
Additional Hints
(Decrypt)
Jngpu bhg sbe gebyyf