10.5.1795 de Gr[ ] according to GD website but a look at the scanned diary image will confirm this is dr Grieve, adv at Mackintosh's
John Grieve DNB 1744-1805. In Russia 1788-1783, married Rebecca Kinnersley (1771-1811) 11.6.1792 St Marylebone. In Russia 1798-1805