This is from The Journal of the Royal Geographical Society: JRGS, Volume 10 written 1841
Many of the names are very familiar, Errer (Hargeisa), Abarro (Abarso), Arabseia (Arabsiyo), Wuch'ali (Wajaale), etc. The route to Zeila was the shorter of the two ports and for those who don't know, Harar was the most important inland hub in the horn.