William Younger, sugar and purity

I'm in a bit of a holding pattern today. I just stopped myself in time. From rashly posting something. But more of that later.

It's William Younger trotting out the scientists to prove their beer wasn't going to poison you. This one is in response to the next great beer poisoning scare: arsenic in 1900. Except, unlike the strychnine scare, this one was real. And killed many.

"WILLIAM YOUNGER AND COMPANY, LIMITED.

The following Circular Letter and Certificate of Analysis, certifying the purity of our Ales, have been issued to our customers.
J. W. SHENNAN, Secretary.

COPY CIRCULAR LETTER. Abbey and Holyrood Breweries, Edinburgh, 6th December, 1900.

Dear Sir.

No sugar of any kind being used by us in brewing, we unhesitatingly guarantee our beers free from impurities or any sort, and refer you to the enclosed copy of Certificate of Analysis.

We are. Dear Sir,

Yours truly,
WILLIAM YOUNGER & Co., Limited.
W. J. YOUNGER, Director.

COPY CERTIFICATE.
Analytical Laboratory,
Surgeons' Hall, Edinburgh. 5th December. 1900.

I have carefully analysed samples of Messrs William Younger and Co.'s (Limited) Ales and Stout, taken from various brewings selected by me from their Stores at Abbey and Holyrood Breweries, Edinburgh, and find such to be perfectly free from Arsenic or any Metallic impurity.

From a further investigation, I am satisfied that these Ales and Stout are brewed from the best class of materials, and are pure, sound, and wholesome.
(Signed) W. IVISON MACADAM,
F.E.S.E., F.T.C., F.C.S., &c.
Analytical and Consulting Chemist;
Professor of Chemistry and Toxicology.
New Veterinary College, Edinburgh."
Sunderland Daily Echo and Shipping Gazette - Tuesday 8 January 1901, page 1.

Personally, I'd have had more faith in the recommendation of someone from a human medical establishment rather than a veterinarial one.

Why the mention of sugar? Because the arsenic got into beer through brewing sugar which had been inverted with non food-grade sulphuric acid. No need to worry about Younger's beers though, because they contained no sugar. At least that's what they've sworn. But was it true?

Frustratingly, I don't have Younger's brewing records for 1900. But I do have some for 1899. And guess what? Not only were they using sugar, they were using 5 different types: DM Invert, Glucose, Caramel, Corpulose and another I can't decipher. And they used it in loads of their beers. Not all, but a lot: XXX, XX, No. 1, No. 3, 60/-, 100/-, 120/-, DBS, S1, SS1.

The next records I have are from 1913. It's the same story there: loads of sugar. So did William Younger stop using sugar in 1900 then start again sometime before 1913? Or did they always use sugar and just improved the truth for publication? My money's on the latter.