|Alternative reference number
|Copy letter from Robert William Frederick Harrison, to Mr Carl Zeiss, 29 Margaret Street, W.
|13 December 1905
|'On December 8th we sent you cheques for £1.12.5 and £17.18.0 in discharge of bills for accessories, Sleeping Sickness Investigation. The receipted a/c [account] for £1.12.5 has been received but not that for £17.18.0. Kindly acknowledge the receipt of the cheque and send receipted account'.