Dingbat, for discussions' sake there's two types of publishers- commercial publishers, which will print, distribute and promote your book, and vanity publishers, which basically are selling you a print job.
Are these memoirs in book form? Is it a manuscript, or merely a diary?At any rate if it's a manuscript then get a literary agent and ask him to look at it and submit it for you. No publisher will even read a manuscript solicited by someone they've never heard of- they'll return it to you unopened. LOL Get an agent- that way you at least get a rejection slip along with your returned manuscript.
If you use a vanity publisher you are basically buying a print job. How will you market it? Shelfspace is at a premium anywhere, and nonexistant for the self published at mainstream bookstores.
Get an agent, might save you some time and money or he might make you some.
Good luck