Information from the seven volumes of Directory of Scottish Settlers in North America, 1625-1825, by David Dobson, published by the Genealogical Publishing Company of Baltimore, Maryland, is now on Ancestry. It comprises 26,157 entries.
Searches return, where available, name, birth date, residence year, residence place, ship, relatives and a link to the publication image.
A search for Canada residence returns 777 items, many in Eastern Ontario, 40 in Perth.
Data in the volumes were collected from “a range of Scottish newspapers and magazines in national, regional and local circulation.”