 Burnham gives the position of the soundings as .He states that an English ship from San Francisco to Liverpool reported discoloured water in the same location at the same time.Marine historian Felix Riesenberg notes that earlier mariners had observed large icebergs stationary in the area, suggesting they had grounded on the bank; these have typically been 200 ft or more in height, with a corresponding depth of 800 to 1,400 ft below the surface; others could have been several miles in length and up to 1000 ft high, while a berg sighted by a Captain CC Dixon in 1860 was L-shaped, 50 miles long on one leg, and 30 miles on the other.