Voyage of the 'Orwell'

William Read commented that 'the "Orwell"... ...landed her passengers, having completed her passage of 100 miles'. Today I investigated this further by retracing the paddle steamer's voyage from Ipswich using a Google Map and its Distance Tool. It appears that Read probably disembarked at Billingsgate Market. This point on the Thames was close to the Spread Eagle Inn and is, according to Google, 97.7634 miles from Ipswich.