GSWA No 71/10
LB B93/24
Perth, 6th August 1915
Mr Ernest Hall,
Cossack
Sir,
The specimen submitted by you on 14th July have been examined in the Departmental Laboratory with the results as set forth in the certificate attached.
I have the honour to be,
Sir,
Your obedient servant,
A Gibb Maitland
Government Geologist.
Assay Certificate
Estimation of Phosphoric oxide in six Samples for Mr. Aubrey Hall