That’s an interesting link Morf – I’ve always thought the ‘Pentene’ symbol theory about Z’s rune symbol was pretty strong (I think that was yours?).
I’ve been thinking about the type of work someone might undertake at a large refinery – it seems very plausible that certain workmen would need to use Wingwalkers for certain maintenance jobs as there are undoubtedly large structures like plane wings that are fragile and contain highly flammable liquid. Could the whole military/wingwalker angle be a mistake?

i think steel toed boots would be worn in a refinery area…i do remember a steel I beam symbol eventually located to a steel firm out of houston texas??? (Z used this symbol)…i dunno..its an interesting take and or Z path..i still think military but anything is possible

That’s an interesting link Morf – I’ve always thought the ‘Pentene’ symbol theory about Z’s rune symbol was pretty strong (I think that was yours?).
I’ve been thinking about the type of work someone might undertake at a large refinery – it seems very plausible that certain workmen would need to use Wingwalkers for certain maintenance jobs as there are undoubtedly large structures like plane wings that are fragile and contain highly flammable liquid. Could the whole military/wingwalker angle be a mistake?

Thanks. Yeah, I posted that a long while back:

A major technological application for cerium(III) oxide is a catalytic converter for the oxidation of CO emissions in the exhaust gases from motor vehicles. In particular, cerium oxide is added into diesel fuels. Another important use of the cerium oxide is a hydrocarbon catalyst in self cleaning ovens, incorporated into oven walls and as a petroleum cracking catalyst in petroleum refining.
Cerium(III) chloride (CeCl3), also known as cerous chloride or cerium trichloride, is a compound of cerium and chlorine

The oxide is finding increased use as a glass polishing agent instead of rouge, for it polishes much faster than rouge. Cerium, with other rare earths, is used in carbon-arc lighting, especially in the motion picture industry. It is also useful as a catalyst in petroleum refining

This is the Pentene symbol used in Petroleum Production chemistry
Z wrote "I am mildy cerous", so yeah, I think there could certainly be a clue there. Not a perfect match, but if you reverse it, it’s close to the same as Zodiac’s halloween card

In the Zodiac case, there was a Humbe Oil located in Benicia not far fom Lake Herman Road where the Z crimes officially started. Butinterestingly, there was an oil refinery very close to the Domingos/Edwards crime scene. Could Z(if he was the killer of Domnigos/Edwards)have transferred up to the Benicia refinery?

STANDARD-HUMBLE OIL PLATFORM "HAZEL," SUMMERLAND
"The first drilling tower included in this study was built by the Standard and Humble Oil Companies in July 1958, 2.2 miles off Summerland, Santa Barbara County. It stands in 100 feet of water and extends 213 feet above the surface (Figure 37). Drilling was conducted through casings which extend from the platform several feet into the ocean floor."

Is it possible that Zodiac worked down in the Santa Barbara area for Humble Oil, and then transferred up to Benicia? Of course, in the following photo, we see a oil refinery plant just up the road from the Domingos/Edwards crime scene. So far, I cant find out if it was there in 1963, and if so, what was the name of the plant. If it was HUMBLE, that would be pretty interesting.

It seems it was there in 1957 under the name Humble Oil
http://archives.slc.ca.gov/Meeting_Summ … 469C56.pdf
http://petrowiki.org/History_of_offshore_drilling_units

quote
Fig. 4 shows the Humble SM-1 drilling barge (204 × 34 × 13 ft) built and owned by Humble Oil and Refining Co. (now ExxonMobil) in 1957. Fig. 5 shows the subsea equipment used to drill the wells. Note that it has no marine riser. The Humble SM-1 drilled 65 wells for a total cost of $11.74/ft, about double the cost of land drilling at the time, in an average water depth of 159 ft and with a maximum well depth of 5,000 ft. The unit averaged 8.93 days per well and drilled an average of 324 ft/D. Unfortunately, the unit sank in a storm in 1961 while on loan to another operator.[6] At the insistence of insurance underwriters, the American Bureau of Shipping (ABS) wrote and implemented, in 1968, the first independent codes, guidelines, and regulations concerning the design, construction, and inspections of MODU hulls.

 

Thanks for that info. I dont know enough about oil refining to know what the differences are between working at a refinery on land, or one in the water. The one close to the D&E scene was on land,but I am sure there ones closeby in the water too.

WOW !
I think I rmember that the 2 individuals that volunterd to come down to the Vallejo PD? in a FBI report to have their guns both 9mm lugers tested, 1 acted suspicous and refused to talk further ,remember , worked at Humble oil . I thought it odd as Leigh working at a refinery also ,but it is a large industry there. worth looking at again ?

WOW !
I think I rmember that the 2 individuals that volunterd to come down to the Vallejo PD? in a FBI report to have their guns both 9mm lugers tested, 1 acted suspicous and refused to talk further ,remember , worked at Humble oil . I thought it odd as Leigh working at a refinery also ,but it is a large industry there. worth looking at again ?

I think I know the two you are talking about(one had RH initials),but if I recall correctly, they would have been about 15 years old in 1963 when D&E were killed

WOW !
I think I rmember that the 2 individuals that volunterd to come down to the Vallejo PD? in a FBI report to have their guns both 9mm lugers tested, 1 acted suspicous and refused to talk further ,remember , worked at Humble oil . I thought it odd as Leigh working at a refinery also ,but it is a large industry there. worth looking at again ?

I think I know the two you are talking about(one had RH initials),but if I recall correctly, they would have been about 15 years old in 1963 when D&E were killed

Is this the one you were talking about? If so, don’t see a Humble Oil mention(maybe its elsewhere in the report?)

Turns out that both of these guys were old enough to have been at the D&E crime scene in 63. I know who both of these guys were and checked them out finding no links to southern CA

WOW !
I think I rmember that the 2 individuals that volunterd to come down to the Vallejo PD? in a FBI report to have their guns both 9mm lugers tested, 1 acted suspicous and refused to talk further ,remember , worked at Humble oil . I thought it odd as Leigh working at a refinery also ,but it is a large industry there. worth looking at again ?

are we talking arthur lee allan (ALA)??.i have not totally tossed him in the dung pile as some have done..at this point i think it is a mistake to do so…

i think steel toed boots would be worn in a refinery area…i do remember a steel I beam symbol eventually located to a steel firm out of houston texas??? (Z used this symbol)…i dunno..its an interesting take and or Z path..i still think military but anything is possible

Are you referring to the wide flange beam?

i think steel toed boots would be worn in a refinery area…i do remember a steel I beam symbol eventually located to a steel firm out of houston texas??? (Z used this symbol)…i dunno..its an interesting take and or Z path..i still think military but anything is possible

Are you referring to the wide flange beam?

dunno..i seem to remember a steel I beam pic with some close Z symbol on it…thats all i remember…Z could very well have worked in some capacity in an oil field or a refinery…i do think its more probable he was former military..sorry all i remember

It was suggested that the symbol used on the Halloween card was close to the symbol used to mark wide flange beams used in steelworking. This was the purported theory at the time, or thereabouts.

I’ve never been convinced by the wide-flange beam theory. A quick google image search only throws up one or two technical drawing that are reminiscent of the Z symbol. I think Morf’s idea of the 1-Pentene symbol is a far better match (google it to see). It’s also got some good circumstantial backup in the strong links to the term ‘cerous’ in the petrochemical industry, which I’m sure we all know as one of Z’s famous mis-spellings (ridiculously mis-spelled in fact, far more incorrect than most of his ‘errors’).

I’ve never been convinced by the wide-flange beam theory. A quick google image search only throws up one or two technical drawing that are reminiscent of the Z symbol. I think Morf’s idea of the 1-Pentene symbol is a far better match (google it to see). It’s also got some good circumstantial backup in the strong links to the term ‘cerous’ in the petrochemical industry, which I’m sure we all know as one of Z’s famous mis-spellings (ridiculously mis-spelled in fact, far more incorrect than most of his ‘errors’).

You’re right, he went out of his way to spell that the way he did