Alexander burnes wrote a book 'travels into bokhara' in 1834. It can be downloaded at
https://archive.org/details/travelsintobokh04burngoog
He personally met Maharaja Ranjit Singh during his travels.
His quotes:
1. About half way across the “ Doab" we reached Pidana, the seat of one of the principal chiefs of the Punjab, Sirdar Juwala Sing, who
had been sent from Lahore to entertain us at his family mansion. He met us about a mile out,
and delivered a letter with a bow and a bag of money. The chief had robed himself in a rich dress of brocade, and his retainers were arrayed in tunics of yellow, which is the favourite colour of the Seiks.