If there are any extraordinary Productions of Nature or Art, exhibited, at the Fair of Leyden, write me an Account and a description of them, and insert them in your Journal.1
There were so many Rarities, at the Fair of Amsterdam, that I think these Fairs worth seeing. A Youth may store his Mind with many new Ideas, and with many usefull Reflections by attending to these Things. To open your Views and enlarge your Ideas of Nature, you ought not to neglect any innocent Opportunity.
See Waterhouse to JA, 21 May, above. If JQA followed his father's advice, no record of it appears. No “Journal” kept by him has been found for this period, though he resumed his diary in a new booklet on 9 June (D/JQA/4 in the Adams Papers, Microfilms, Reel No.7).