If I translated some old forms of my language into english, it would be for example: "They walked through two prayers", meaning: the time of their walk was similar to saying "Pater Noster" prayer twice. If there are similarly popular prayers in Glorantha, they can be conveniently inaccurate time measure 🙂
According to non SI measurements, they were wonderful mess. Now we have only two miles, land and sea mile, both parts of imperial system. But before 1800 almost every country had their own mile, pound, stone etc. And mile length varied from country to country from 0,9 to 12 km (imperial land mile is about 1,6 km). Even cities had their own measurements, usually marked on a townhall, showing a city standard for a foot, an elbow (length from the elbow to the end of your hand, commonly used to measure cloth).
I think it would be interesting to make a treasure map, give it to players. Unfortunately, it is marked in yards, but - lets say - they need the old Clearwine yard. Nowadays this measure is not used, almost everybody uses the Jonstown yard. Unfortunately, the old Clearwine town hall was destroyed 30 years ago, rebuilt without those marks, and the stones from the old town hall were sold to two different thanes, who built their houses... etc. It may take a lot of time and effort to find the treasure just becouse of old measurements 😄