Copy letter from an unknown correspondent, to Mr Collings 'I have found your a/c [account] for £12-2-0. Sorry. I see that the 3 Hopkinson dias [digrams] cost 1-4-0 & the 10 remaining will cost 5-5-6. This estimate may be accepted & put in hand provided that it allows for certain dias [diagrams] having been cut out altogether. Dr Hopkinson tells me he decided that some should not be done at all: have you allowed for this? If so, go on'. 30 November 1893