Erasmus Alvey Darwin has rheumatism; his sisters complain of his bad temper but CD thinks him very good tempered. CD has received a new cabinet. [This is the first of six entries written in a "Memorandum book" comprising four sheets folded into a gather and sewn together in book form. The entries are in the style of letters addressed to an unnamed friend and are dated between 1 and 12 January 1822, shortly before CD’s thirteenth birthday. As they were written straight into the memorandum book, it is clear that they were never sent through the post, but were either to an imaginary recipient, or intended to be read by someone in the household, possibly CD’s youngest sister, Emily Catherine Darwin (Catherine).]

Erasmus Alvey Darwin is good tempered and their sisters have "not abused at all". Hopes the recipient will help "in looking out and washing the fossils out of the plate closet".

"Monseur Beodoes" is inquisitive and impertinent; Mr Bayly "was formerly a devlish boor". Asks who his sisters have been talking about.

Likes Mariane who is very good to Miss Jones; CD bought cakes in town while Mariane visited Miss Jones; he was embarrassed to be shown into her bedroom when he returned. Miss Clare has had an accident.

Caroline disapproves of his not washing.

Was joined by Colonel Burgh Leighton when walking in the quarry. Plans to make caves next summer to store "warlike instruments" and "relicks". Sketches a design for a signalling device. May go with his father to visit the Earl of Powys at Walcot; visited Mrs and Miss Reynolds and William Pemberton Cludde.