Searching for details surrounding the arrival of my great grandmother, Annie Margaret Arp (maiden name possible Heilmacher or Helleweger) to Canada (Ottawa specifically) anywhere between 1870-1880. She was widowed from William Arp and brought over her two sons with her - John Arp and Deitrick Henry Arp. I am trying to search passenger lists on vessels coming into Canada during those years but haven't been successful.
Any information would be useful. Thanks in advance!
Annie DOB: March 30, 1836 Germany
John DOB: September 19, 1862
Deitrich DOB: March 1, 1866