Back to zero

I accidentally reset the odometer on my cycle computer to zero this morning, while fumbling about upside down in an attempt to zero the trip length counter before starting off on a journey to market which (due doubtless to sleep deprivation) turned out to be entirely pointless, since it was not in fact early on Saturday morning but early on Friday morning and there was no market! I could have had several hours more sleep, and shall now have to repeat the entire exercise tomorrow...

Unfortunately I really have no idea what the old reading was, since though I mentally noted it a number of times over the last few months I never remembered to actually record it once I got indoors :-p