ISHAM: John Isham, Mercer and Merchant Adventurer, Two Account Books of a London Merchant in the Reigh of Elizabeth I. 1962by G. D. Ramsay John Isham was involved in business transactions related to cloth and wool during the 16th century, likely originating from broadcloth shipments from London. Gregory Isham, a significant figure in the Isham firm, navigated both success and financial difficulties in his business endeavors. The Mercers' Company played a crucial role in the business dealings of John Isham, reflecting the interconnectedness of trade and commerce during