5.6.1808 dine at Knowles's, w. Fuseli, Jeffery / 7.8.1808 dine at Jeffery's, Eltham, w. Bonnycastle & Knowles / 7.5.1811 Jeffery, & British Institution w. M J & T T / 5.1.1817 call on Jeffery (among 8 incl. Knowles) / 9.2.1817 call on Jeffery, adv. Brougham / 7.3.1831 call on Jeffery (not seen)
4.6.1808 walk w. T T (Berkeley)
I presume this meant that Godwin and Thomas Turner took a walk and discussed the ideas of George Berkeley DNB 1685-1753
31.5.1808 call on Northcote; adv. E Cowper / 1.9.1817 again
Clearly a long term acquaintance of James Northcote DNB 1746-1831 artist. I considered a mistress of the bachelor Northcote but decided it was more probably Peter Leopold &c, the 5th Earl Cowper 1778-1837, (succeeded 1799) who perhaps enjoyed Northcote's famous conversation.
19.5.1808 G Walker calls / 21.5.1808 write to G Walker / 23.5.1808 G Walker calls (not seen) / 24.5.1808 G Walker calls
Holdens Directory 1811; George Walker, publisher of music at half price, and warehouse for Hope's Hectic Pills, 106 Gt Portland-st, his will PCC 1847 / George Walker, attorney, 15, Craven-st, Strand
A very common name so no identity suggested, but an interesting outside possibility is that this was George Walker DNB 1772-1847 gothic novelist who satirised Godwin in The Vagabond 1799 and Timothy Thoughtless 1813
19.5.1808 call on R Taylor; adv. J H, advertiser / 23.6.1808 Advertising calls
16.5.1808 M(arshall) calls from Macmurdo
Only instance of this name in Godwin's diary, but I have quite a good candidate. Edward Longdon Mackmurdo 1757-1817 of Clapton will PCC 1817 mentions wife Elizabeth, 3 sons, 8 daughters & nephew Robert Stark Mackmurdo. He was buried at Bunhill Fields, calico printer. One of his sons' birth registered 1798 Gilbert Wakefield Mackmurdo at Kings Weigh House Chapel, Whites Row. 1798 was when Gilbert Wakefield DNB 1756-1801 was tried and imprisoned for writing a book.
3.5.1808 call on Sturley, Swaffham: Bradenham, with do.: meet P(hilip) H(ull) G(odwin): Sturley dines
2.5.1808 coach, w. Mayes, &c (via Cambridge to Swaffham, Norfolk)
Only time this name occurs in Godwin's Diary so I'll resist the temptation to guess, except to mention Mr Mayes, farmer of Gresham, Norfolk will PCC 1821
8.11.1821 H M & Rosser sup / 28.12.1821 H Marshal & H(arwoo)d H(olcrof)t sup / 7.2.1822 H Marshal at tea / 28.2.1822 H M sups / 13.3.1822 again / 27.5.1822 again / 5.6.1822 Hudson sups: adv. H M / 10.6.1822 P(eter) P(ilcher) & H M at tea / 3.8.1822 H M sups / 23.8.1822 again / 24.10.1822 H M & H(arwoo)d H(olcrof)t sup / 5.12 H M sups / 9.12.1822 M(arshall), & H M, & M(ary) Lamb call / 17.1.1823 Hudsons & H M at tea / 25.3.1823 Lambs & H M sup / 18.4.1823 Kenney & H M sup / 5.5.1823 H M sups / 12.5.1823 theatre, w.
10.4.1808 F(enwic)k & Orlando dine; adv. Plant
No clue