This letter to Leatham is from Christopher Murray Grieve, better known as the writer Hugh McDermaid, who at this time was a Scottish Nationalist. The letter reads:
Postponed sending p.o. [postal order] with intention of visiting you - but alas!…
Leslie's differential thermometer. Double bulbs on ends of a tube set into delicate wooden base. One bulb blue, one clear; liquid (blue) broken column. Faded mark on underside base showing existence of rectangular label.