Physical description
Notes from C & H Ltd., dated Sept 16, 1937 titled 'Scale Buoys'. Typed on paper with printed letterhead of W. H. Cunningham and Hill, Limited. Notes are a review of results since W. H. Cunningham and Hill, Limited, Wholesale Plumbing and Heating Specialists were handed a patented article, told what it would do, how to apply it, and started out to prove it.