Very pleasant day without much sunshine : Temperature less. Wind very slight, first S. and later N : almost thundery-looking in evening. Saw 9 cases walking + cycled to Heather Mill + Linglie Mill.1 Worked out a run from Haslemere to Eastbourne = 61 [miles].2 Had meeting of Cycle Club.3 Committee to choose badge + arrange runs.
1 Heather Mill was at Riverside and Linglie Mill off Level Crossing Road, both Selkirk.
2 The proposed journey from Haslemere, Surrey to Eastbourne, Sussex was about 61 miles one way. That is what Dr Muir has written and the distance fits but note that on 17 July 1923 Dr Muir cycled to Easebourne, Midhurst, West Sussex.
However, if it turns out that Dr Muir did also have a run to Eastbourne then return journey would be beyond anything Dr Muir has done since at least the First World War so he must have been planning a train journey one way. Dr Muir was fit. On 30 July 1916 he noted “Have not used the motor since June 17 & have cycled 776.4 miles.” and on 10 August 1918 he recorded “For the 2nd time in my cycling experience I did one hundred miles viz 100.2.” Though the day after that ride Dr Muir claimed that he “Felt wonderfully fresh after my 100 miles yesterday.” five years later and 20 miles further was almost certainly too much for a man approaching his 80th year.
3 The Cycle Club was a new one and they were evidently working out how best to operate.

[Source: Scottish Borders Archives & Local History Service SBA/657/26, Dr J S Muir of Selkirk, medical practitioner, journal for 1923]