Pottinger Map and Gordon Map

Dear Colleagues,

I found two layouts of maps. One from 1842 which is named (the Pottinger Map), and the other map from 1843 is named (the Gordon Map)

I tried to search who this Mr. Gordon was. I could not find a surname of this person. Who was Mr. Gordon ?

Any information regarding Mr. Gordon is very much appreciated

Thank you and kind regards,

Daniel