Ros,
Be aware that Northern Echo started in 1870. The Sunderland Echo started in 1873.
Although Richard was born in Darlington (area) it seems he hardly ever lived there. 1861 Sunderland, 71 Hetton le Hole, 81 Sunderland, 91 Bishop Auckland (area), 1901 Durham City.
I don't know what papers were read in Bishop in 1890s !
A broad search of national newspapers , including the Newcastle Courant, for "Bonny Dick" ( via my membership of Newcastle City Library) does through up several mentions in late 1880s, but all are for Bonny Dick, a coursing greyhound.
Don't spend too much time on this search... I have the "T" Shirt, in fact more than one.
Good Hunting
MichaeL Dixon